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Shadow libraries (also pirate libraries or black open access) are online repositories of freely available
digital media In mass communication, digital media is any media (communication), communication media that operates in conjunction with various encoded machine-readable data formats. Digital content can be created, viewed, distributed, modified, listened to, an ...
that are normally
paywall A paywall is a method of restricting access to content (media), content, with a purchase or a subscription business model, paid subscription, especially news. Beginning in the mid-2010s, newspapers started implementing paywalls on their website ...
ed, access-controlled, or otherwise not readily accessible. Shadow libraries usually contain textual works like
academic papers Academic publishing is the subfield of publishing which distributes academic research and scholarship. Most academic work is published in academic journal articles, books or theses. The part of academic written output that is not formally publis ...
and
ebook An ebook (short for electronic book), also spelled as e-book or eBook, is a book publication made available in electronic form, consisting of text, images, or both, readable on the flat-panel display of computers or other electronic devices. A ...
s, and may include other digital media like software, music, or films.
Anna's Archive Anna's Archive is an open source search engine for shadow library, shadow libraries that was launched by Anna shortly after law enforcement efforts to Z-Library#United States, shut down Z-Library in 2022. The site aggregates records from major ...
,
Library Genesis Library Genesis (shortened to LibGen) is a shadow library project for file-sharing access to scholarly journal articles, academic and general-interest books, images, comics, audiobooks, and magazines. The site enables free access to content th ...
,
Sci-Hub Sci-Hub is a library website that provides free access to millions of research papers, regardless of copyright, by bypassing publishers' paywalls in various ways. Unlike Library Genesis, it does not provide access to books. Sci-Hub was found ...
,
UbuWeb UbuWeb is a "a pirate shadow library consisting of hundreds of thousands of freely downloadable avant-garde artifacts." It offers visual, concrete and sound poetry, expanding to include film and sound art mp3 archives. The site was created by ...
and
Z-Library Z-Library (abbreviated as z-lib, formerly BookFinder) is a shadow library project for file-sharing access to scholarly journal articles, academic texts and general-interest books. It began as a mirror of Library Genesis but has expanded dram ...
are some of the most popular shadow libraries for books and academic literature.


History

Early predecessors to shadow libraries were informal collections of unauthorized digital copies of books, scholarly literature, and other textual media, often shared with small groups via
mailing list A mailing list is a collection of names and addresses used by an individual or an organization to send material to multiple recipients. Mailing lists are often rented or sold. If rented, the renter agrees to use the mailing list only at contra ...
s, forums, or social media websites. Online communities of scientists also collaborated to share paywalled literature among themselves. Many shadow libraries originate in Russia, which has a rich history of ''
samizdat Samizdat (, , ) was a form of dissident activity across the Eastern Bloc in which individuals reproduced censored and underground makeshift publications, often by hand, and passed the documents from reader to reader. The practice of manual rep ...
'' stemming from the
Soviet The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
era. There was strict state censorship and control of print materials, which gave rise to the dissident activity of copying and disseminating censored or underground works. Even after the dissolution of the Soviet Union and the end of the official censorship program, these sharing practices continued as a result of widespread economic hardship. Texts were widely digitized and shared on Russian
FidoNet __ / \ /, oo \ (_, /_) _`@/_ \ _ , , \ \\ , (*) , \ )) ______ , __U__, / \// / FI ...
systems as computer and internet access became more widespread in Russia. One early collection of digitized texts was Maksim Moshkow's 1994 Lib.ru. The Russian
Kolkhoz collection A kolkhoz ( rus, колхо́з, a=ru-kolkhoz.ogg, p=kɐlˈxos) was a form of collective farm in the Soviet Union. Kolkhozes existed along with state farms or sovkhoz. These were the two components of the socialized farm sector that began to em ...
, named for the
kolkhoz A kolkhoz ( rus, колхо́з, a=ru-kolkhoz.ogg, p=kɐlˈxos) was a form of collective farm in the Soviet Union. Kolkhozes existed along with state farms or sovkhoz. These were the two components of the socialized farm sector that began to eme ...
collective farms, was created by a community that worked in the early 2000s to download or digitize scientific texts, which they stored on FTP servers and DVDs. This collection eventually grew to around 50,000 documents. Some of these early collections later became shadow libraries as they attracted volunteer librarians who catalogued the archives' contents. Early academic shadow libraries in the 2000s included Textz.org,
Monoskop Monoskop is a self-described "wiki A wiki ( ) is a form of hypertext publication on the internet which is collaboratively edited and managed by its audience directly through a web browser. A typical wiki contains multiple pages that ca ...
, and Gigapedia (later Library.nu). Gigapedia focused more on academic texts than other shadow libraries, which mainly contained literature. Around 2006 or 2007, it incorporated the files amassed by the Kolkhoz collectors, and had become the largest shadow library by 2010. Gigapedia, by then renamed to Library.nu, was shut down in 2012 through a lawsuit from a coalition of seventeen publishing companies including
HarperCollins HarperCollins Publishers LLC is a British–American publishing company that is considered to be one of the "Big Five (publishers), Big Five" English-language publishers, along with Penguin Random House, Hachette Book Group USA, Hachette, Macmi ...
,
Oxford University Press Oxford University Press (OUP) is the publishing house of the University of Oxford. It is the largest university press in the world. Its first book was printed in Oxford in 1478, with the Press officially granted the legal right to print books ...
, and MacMillan. Library Genesis (also known as LibGen) was founded in approximately 2007 or 2008 by a group of Russian scientists, who began by organizing a collection of Russian science and technology texts made available on a torrent site, aggregated from sources including the Kolkhoz collection and lib.ru. In 2011, LibGen absorbed the Library.nu collection, keeping it accessible even as Library.nu was forced to shut down. At the time, LibGen was unique in its focus on its open library infrastructure, prioritizing the free sharing of its collection, catalog, and source code to encourage many others to increase shadow libraries' collective resiliency by
mirroring Mirroring is the behavior in which one person subconsciously imitates the gesture, idiolect, speech pattern, or attitude of another. Mirroring often occurs in social situations, particularly in the company of close friends or family, often going ...
and forking the project.


Motivation

Shadow libraries are part of the
open access Open access (OA) is a set of principles and a range of practices through which nominally copyrightable publications are delivered to readers free of access charges or other barriers. With open access strictly defined (according to the 2001 de ...
and
open knowledge Open knowledge (or free knowledge) is knowledge that is free to use, reuse, and redistribute without legal, social, or technological restriction. Open knowledge organizations and activists have proposed principles and methodologies related to the ...
movements. They seek to more freely disseminate academic scholarship and other media, often citing a
moral imperative A moral imperative is a strongly-felt principle that compels a person "in question" to act. It is a kind of categorical imperative, as defined by Immanuel Kant. Kant took the imperative to be a dictate of pure reason, in its practical aspect. Not ...
to make knowledge freely available. LibGen's operators have described the site's mission as enabling access to information for poor people and opposing the gating of knowledge by elite academic institutions, with one administrator writing "the target groups for LibGen are poors: Africa, India, Pakistan, Iran, Iraq, China, Russia and post-USSR etc., and on a separate note, people who do not belong to academia. If you are not at a university, you can't access anything or at least your access will be so much troubled that you won't be able to progress at all."
Alexandra Elbakyan Alexandra Asanovna Elbakyan (, , born 6 November 1988) is a Kazakhstani computer programmer and creator of the website Sci-Hub, which provides free access to research papers without regard for copyright. According to a study published in 2018, S ...
, the creator of
Sci-Hub Sci-Hub is a library website that provides free access to millions of research papers, regardless of copyright, by bypassing publishers' paywalls in various ways. Unlike Library Genesis, it does not provide access to books. Sci-Hub was found ...
, has justified the site by arguing that the lack of open access to scholarship violates the human
right to science and culture The right to science and culture is one of the economic, social and cultural rights claimed in the Universal Declaration of Human Rights and related documents of international human rights law. It recognizes that everyone has a right to freely part ...
, captured in Article 27 of the
United Nations The United Nations (UN) is the Earth, global intergovernmental organization established by the signing of the Charter of the United Nations, UN Charter on 26 June 1945 with the stated purpose of maintaining international peace and internationa ...
Universal Declaration of Human Rights The Universal Declaration of Human Rights (UDHR) is an international document adopted by the United Nations General Assembly that enshrines the Human rights, rights and freedoms of all human beings. Drafted by a UN Drafting of the Universal D ...
, which states: "Everyone has the right freely to participate in the cultural life of the community, to enjoy the arts and to share in scientific advancement and its benefits." Elbakyan has also argued that "Any law against knowledge is fundamentally unjust". American activist
Aaron Swartz Aaron Hillel Swartz (; November 8, 1986January 11, 2013), also known as AaronSw, was an American computer programmer, entrepreneur, writer, political organizer, and Internet hacktivism, hacktivist. As a programmer, Swartz helped develop the we ...
captured the motivations of many shadow libraries in his 2008 '' Guerilla Open Access Manifesto'', writing: Shadow libraries have also cited the increasing cost of academic literature and books, also termed the "
serials crisis The term serials crisis describes the problem of rising subscription costs of serial publications, especially scholarly journals, outpacing academic institutions' library budgets and limiting their ability to meet researchers' needs. The prices ...
".


Technologies

Some shadow libraries (or their content databases) make use of
BitTorrent BitTorrent is a Protocol (computing), communication protocol for peer-to-peer file sharing (P2P), which enables users to distribute data and electronic files over the Internet in a Decentralised system, decentralized manner. The protocol is d ...
(mainly for database dumps),
dark web The dark web is the World Wide Web content that exists on darknets ( overlay networks) that use the Internet but require specific software, configurations, or authorization to access. Through the dark web, private computer networks can communica ...
, and
InterPlanetary File System The InterPlanetary File System (IPFS) is a protocol, hypermedia and file sharing peer-to-peer network for sharing data using a distributed hash table to store provider information. By using content addressing, IPFS uniquely identifies each fi ...
(IPFS) technologies to increase their resilience or distribute loads. Shadow libraries including LibGen and
Anna's Archive Anna's Archive is an open source search engine for shadow library, shadow libraries that was launched by Anna shortly after law enforcement efforts to Z-Library#United States, shut down Z-Library in 2022. The site aggregates records from major ...
develop and make their software accessible as
open source software Open-source software (OSS) is Software, computer software that is released under a Open-source license, license in which the copyright holder grants users the rights to use, study, change, and Software distribution, distribute the software an ...
, enabling code development by any volunteer and encouraging mirrors or forks. Anna's Archive claims that "if we get taken down we'll just pop right up elsewhere, since all our code and data is fully open source".


Legal status

Shadow libraries often host or link to copyrighted material without the consent of copyright holders, making them illegal or dubiously legal in many countries. Such libraries are also described as
pirate Piracy is an act of robbery or criminal violence by ship or boat-borne attackers upon another ship or a coastal area, typically with the goal of stealing cargo and valuable goods, or taking hostages. Those who conduct acts of piracy are call ...
libraries. Many shadow libraries maintain bibliographic catalogs separate from the hosting of files themselves. This is both an organizational convenience and a protection against legal challenges, since the law is often ambiguous on the distinction between hosting and indexing copyrighted content. However, several shadow library catalogs have been the target of injunctions and takedown threats. The aggressive legal strategies pursued by Western music and film industries against online filesharing websites during the 2000s were not widely mirrored by academic or literary publishers against shadow libraries. However, as shadow libraries have grown larger and more visible, they have attracted more legal challenges. Library.nu (previously Gigapedia) was shut down in 2012 by a lawsuit from a coalition of seventeen publishing companies including
HarperCollins HarperCollins Publishers LLC is a British–American publishing company that is considered to be one of the "Big Five (publishers), Big Five" English-language publishers, along with Penguin Random House, Hachette Book Group USA, Hachette, Macmi ...
,
Oxford University Press Oxford University Press (OUP) is the publishing house of the University of Oxford. It is the largest university press in the world. Its first book was printed in Oxford in 1478, with the Press officially granted the legal right to print books ...
, and MacMillan. In 2015, the academic publisher
Elsevier Elsevier ( ) is a Dutch academic publishing company specializing in scientific, technical, and medical content. Its products include journals such as ''The Lancet'', ''Cell (journal), Cell'', the ScienceDirect collection of electronic journals, ...
sued LibGen and Sci-Hub in American courts, accusing them of "operat ngan international network of piracy and copyright infringement". Elsevier won a
default judgment Default judgment is a binding judgment in favor of either party based on some failure to take action by the other party. Most often, it is a judgment in favor of a plaintiff when the defendant has not responded to a summons or has failed to app ...
against the two groups, and was awarded $15million in damages, but has not collected the money as LibGen's operators are unknown and Sci-Hub's are outside the reach of the US legal system. Although the judge in the Elsevier case granted an injunction against several domains used by the shadow libraries, briefly taking them offline, the libraries quickly moved to new domains and onion sites. A lawsuit by the
American Chemical Society The American Chemical Society (ACS) is a scientific society based in the United States that supports scientific inquiry in the field of chemistry. Founded in 1876 at New York University, the ACS currently has more than 155,000 members at all ...
in 2017 against Sci-Hub also resulted in a judgment order for $4.8million in damages. In November 2022, the FBI seized domains associated with Z-Library and charged two of its operators with criminal copyright infringement, wire fraud, and money laundering. Courts have ordered
Internet service provider An Internet service provider (ISP) is an organization that provides a myriad of services related to accessing, using, managing, or participating in the Internet. ISPs can be organized in various forms, such as commercial, community-owned, no ...
s in countries including Denmark, France, Germany, Russia and the United Kingdom to block access to pirate libraries, although these blocks are of limited effectiveness. The legality of directing individuals to shadow libraries is undetermined. While there are legal theories that linking to copyright infringing material hosted by shadow libraries could constitute
vicarious Vicarious may refer to: * Vicariousness, experiencing through another person * Vicarious learning, observational learning In law * Vicarious liability, a term in common law * Vicarious liability (criminal), a term in criminal law Religion * Subst ...
or contributory copyright infringement, there have been no cases brought with these theories. In 2019, Elsevier threatened legal action against Citationsy, the developer of a bibliography management tool, for publishing a blog post directing readers to Sci-Hub and Citationsy removed the link. Although most academics are not penalized for distributing their own published works for free, academic publishers have threatened scientists for sharing or republishing their work. Some publishers have accused shadow libraries including Sci-Hub of illegally obtaining login credentials to academic databases, though Sci-Hub says the credentials are voluntarily donated. A class action lawsuit filed in June 2023 against
ChatGPT ChatGPT is a generative artificial intelligence chatbot developed by OpenAI and released on November 30, 2022. It uses large language models (LLMs) such as GPT-4o as well as other Multimodal learning, multimodal models to create human-like re ...
developer
OpenAI OpenAI, Inc. is an American artificial intelligence (AI) organization founded in December 2015 and headquartered in San Francisco, California. It aims to develop "safe and beneficial" artificial general intelligence (AGI), which it defines ...
, led by authors Paul Tremblay and Mona Awad, alleged that the company used shadow libraries to source training data for their
large language model A large language model (LLM) is a language model trained with self-supervised machine learning on a vast amount of text, designed for natural language processing tasks, especially language generation. The largest and most capable LLMs are g ...
. Meta has also been alleged to have used data from shadow libraries to train its AI model. DeepSeek's Vision-Language (VL) model was trained with data from the shadow library Anna's Archive.


Reception


By academics

Some academics have tacitly or explicitly endorsed shadow library efforts, with many viewing them as morally acceptable acts of
civil disobedience Civil disobedience is the active and professed refusal of a citizenship, citizen to obey certain laws, demands, orders, or commands of a government (or any other authority). By some definitions, civil disobedience has to be nonviolent to be cal ...
against the abusive business models of academic publishers. Furthermore, shadow libraries may increase the impact of academics whose work is made available. According to one study from
Cornell University Cornell University is a Private university, private Ivy League research university based in Ithaca, New York, United States. The university was co-founded by American philanthropist Ezra Cornell and historian and educator Andrew Dickson W ...
, articles that are available on Sci-Hub receive 1.72 times as many
citation A citation is a reference to a source. More precisely, a citation is an abbreviated alphanumeric expression embedded in the body of an intellectual work that denotes an entry in the bibliographic references section of the work for the purpose o ...
s as articles from journals of similar quality that are not available on Sci-Hub.


By non-academic authors

Non-academic writers have been more vocally opposed to shadow libraries. In February 2022, after joining a lawsuit with
Amazon Publishing Amazon Publishing (or simply APub) is Amazon's book publishing unit launched in 2009. It is composed of 15 imprints including AmazonEncore, AmazonCrossing, Montlake Romance, Thomas & Mercer, 47North, and Topple Books. Amazon publishes e-books ...
and
Penguin Random House Penguin Random House Limited is a British-American multinational corporation, multinational conglomerate (company), conglomerate publishing company formed on July 1, 2013, with the merger of Penguin Books and Random House. Penguin Books was or ...
against a Ukrainian website selling pirated e-books, American bestselling fiction authors
John Grisham John Ray Grisham Jr. (; born February 8, 1955) is an American novelist, lawyer, and former politician, known for his best-selling legal thrillers. According to the Academy of Achievement, American Academy of Achievement, Grisham has written 37 ...
and
Scott Turow Scott Frederick Turow (born April 12, 1949) is an American author and lawyer. Turow worked as a lawyer for a decade before writing full-time, and has written 13 fiction and three nonfiction books, which have been translated into more than 40 la ...
published an op-ed in ''The Hill'' calling on US lawmakers to pass a law prohibiting search engines from linking to piracy websites. In October 2022, the US-based
Authors Guild The Authors Guild is the United States' oldest and largest professional organization for writers and provides advocacy on issues of free expression and copyright protection. Since its founding in 1912 as the Authors League of America, it has coun ...
submitted a complaint to the
United States Trade Representative The Office of the United States Trade Representative (USTR) is an agency of the Federal government of the United States, United States federal government responsible for developing and promoting Foreign trade of the United States, United States ...
about LibGen and Z-Library, describing digital book piracy as "one of the biggest threats facing authors’ livelihoods today". The Authors Guild and the UK-based Publishers Association both worked with the FBI in efforts against Z-Library, which culminated with November 2022 the arrest of two of its operators. However, some authors and writers' organizations have opposed such efforts. British novelist Alison Rumfitt wrote in ''
Dazed ''Dazed'' (''Dazed & Confused'' until February 2014) is a quarterly British lifestyle magazine founded in 1991. It covers music, fashion, film, art, and literature. ''Dazed'' is published by Dazed Media, an independent media group known for produ ...
'' that she was not celebrating the site's takedown, and that "the hunger to read is something to be encouraged, something which, in my opinion, is a societal good; even as publishing grows ever more overtly capitalist and monopolised, reading still thrives, and piracy allows it to take place despite borders and Digital Rights Management. Not everyone has access to a library, and not every library in the world is well-stocked." Dave Hansen, executive director of the Authors Alliance nonprofit, expressed that students and researchers would be negatively impacted by attempts to shut down shadow libraries, and expressed that such projects were "a kind of symptom of how broken the system is, particularly when you’re looking at access to scientific articles".


References


External links


SLUM: The Shadow Library Uptime Monitor
{{Free culture and open content Intellectual property activism Online databases Open access (publishing) Types of library