Book
A book is a written work of substantial length, and in 2010 Google Books estimated that roughly 130 million unique titles had been published. Behind that staggering number sits a single durable idea, refined over thousands of years. Clay tablets pressed with a stylus around 3200 BC. Papyrus rolled into scrolls. Sheets of parchment bound along one edge. Each was an attempt to make thought portable. The historian James Raven argued that a book is best defined broadly, as a portable, durable, replicable and legible means of recording and disseminating information. Yet the book publishing historian Zoran Velagic admitted that for the book, consensus does not exist even at the level of a basic definition. So what counts as a book, and what merely points toward one? How did writing on flattened clay become a paperback sold in a pharmacy? And what happens to the object itself when the page becomes a screen, a voice, or a pattern of raised dots read by touch?
UNESCO in 1964 tried to settle the question for the practical purpose of counting national book production. Its definition called a book a non-periodical printed publication of at least 49 pages, excluding the cover pages, made available to the public. That number drew a hard line between a book and a pamphlet. Kovac and colleagues criticized this definition for ignoring new formats that did not fit the printed mold. They proposed four criteria instead: length, textual content, a defined form, and information architecture such as linear structure and key textual elements. In their hierarchy of the book, a format that meets more of these criteria sits closer to the traditional printed book. James Raven took a different path, defining the book by function rather than physical features. His inclusive definition would count ebooks, newspapers, and even quipus, the knot-based recording method used by cultures in Andean South America. It would exclude an inscribed monument, because a monument is fixed in place and cannot travel. The word itself carries this long memory. Book comes from the Old English boc, thought to descend from a Germanic root meaning beech, and the Latin codex once meant simply a block of wood.
Cuneiform tablets are the earliest surviving texts widely accepted as writing, created circa 3200 BC during the Uruk period in modern-day Iraq. They grew out of sealed clay envelopes called bullae, which held physical tokens, and the proto-cuneiform marks that stood for those tokens. Scribes pressed a stylus into flattened clay, and the result proved remarkably durable. Many tablets survive to this day, having recorded literature for thousands of years across the Bronze Age and into the Iron Age. The Standard Babylonian version of the Epic of Gilgamesh, one of the oldest surviving works of literature, ran across about 12 tablets, each carrying over 300 lines of cuneiform verse. In Ancient Egypt, hieroglyphs developed in parallel, written on papyrus rolled into scrolls. The oldest surviving unused roll of papyrus was found in the 2900 BC tomb of Hemaka. Scribes wrote in black and red ink, using red to mark titles, section headings, and authorship, a practice called rubrication that lasted for millennia. The codex eventually displaced the scroll. Its first written mention comes from Martial, who praised its compactness in his Apophoreta CLXXXIV at the end of the first century AD. Different cultures adopted it at different speeds. Of surviving Christian texts from before the 5th century AD, 158 of 172 documents counted as of 2002 were codices. Jewish authors were slower, and the scroll became a visual shorthand for Jewish culture, with Torah scrolls still read aloud in synagogues today.
Before print, each text was a unique, handcrafted, valuable article, shaped by the scribe, owner, bookbinder, and illustrator. In the early Western Roman Empire, monasteries kept Latin writing traditions alive, and the clergy were the main readers and copyists. The work was slow. Pages had to be prepared, planned, and ruled, with gaps left for illustration and rubrication, and then the whole thing had to be bound. So few books resulted that even at the end of the Middle Ages, the large Paris library of the Sorbonne held only around 2,000 volumes. The rise of universities in the 13th century pushed demand higher and produced a faster system, in which unbound leaves called pecia were lent out to different copyists at once. A very different tradition flourished across South, Southeast, and Central Asia, where bound palm leaf manuscripts existed for thousands of years. In the 5th century BC, Indian scribes began using the technique to record what had been oral history, and it spread to Myanmar, Thailand, Malaysia, Indonesia, Sri Lanka, and Tibet. Text was etched into a leaf with a sharp metal stylus, then brushed with ink, or the whole surface was coated with a mixture of oil and lamp black or powdered coal. Wiping the smooth leaf with muslin left color only in the incised grooves. Each sheet usually had a hole for a binding string, and the bundles were wrapped in cotton cloth to guard against insects, dust, and dirt. These manuscripts were still being copied until paper came into widespread use in the 19th century.
The Diamond Sutra, dated to 868 AD, is the oldest dated book printed by woodblock, a method that originated in the Han dynasty before 220 AD. Carvers cut a relief image of an entire page into wood, inked it, and pressed copies. When the method reached Europe in the early 14th century, it produced block-books, though each page demanded its own hand-carved block, which could crack if stored too long. The Chinese inventor Bi Sheng made movable type from earthenware around 1045, but no examples of his printing are known to survive. Around 1450, Johannes Gutenberg independently invented movable type in Europe, adding innovations in casting type from a matrix and hand mould. Books printed in Europe before 1501 are known as incunables or incunabula. Steam-powered presses arrived in the early 19th century, able to print 1,100 sheets per hour, raising literacy and reshaping publishing alongside emerging copyright protection. Late in the century, two keyboard-driven machines cast molten metal into type: Monotype, which cast a single letter and was used heavily in book publishing, and linotype, which cast an entire line at once and was favored by newspapers. In 1954, publisher Staley T. McBrayer invented web offset printing, feeding paper as a continuous web that the machine cut into pages. By the 1970s offset printing had largely replaced letterpress, and many former letterpress operators retrained as offset printers.
Stephen King partnered with Barnes and Noble and Amazon.com in 2000 to release his novel Riding the Bullet exclusively as an ebook, and it was downloaded over 400,000 times in the first 24 hours. The idea had been imagined long before it was possible. Bob Brown described his Readies in 1929, Vannevar Bush proposed the Memex in 1945, Angela Ruiz Robles built toward her Enciclopedia Mecanica in 1948, and Alan Kay sketched the Dynabook in 1968. The first widely accepted ebook came in 1971, when Michael Hart started Project Gutenberg by manually retyping the Declaration of Independence. Demand surged during the COVID-19 pandemic, and the library platform OverDrive reported that 662 million e-books, audiobooks, and digital magazines were borrowed in 2023. Audiobooks followed a parallel rise. The earliest were phonograph records made by the American Foundation for the Blind, finding early adoption among visually impaired readers in the United States and Britain. Cassettes in the 1960s and compact discs in the 1980s drew in retailers and traditional publishers. By 2024, U.S. audiobook sales reached 2.22 billion dollars, a 13 percent increase over the prior year, with an estimated 270 million monthly listeners worldwide. Even so, in a 2021 survey of American adults, 65 percent reported reading a printed book in the past year, while 30 percent read an e-book and 23 percent listened to an audiobook.
Refreshable braille displays now let even deaf-blind readers feel a digital book through raised dots that change beneath the fingertips. Accessible publishing makes books available in alternative formats designed to aid or replace the traditional reading process, especially for people who are blind, visually impaired, or otherwise print-disabled. The toolkit has grown wide: larger fonts, specialized fonts for certain reading disabilities, braille, automated audiobooks, and DAISY digital talking books. Modern ebook software lets a reader enlarge most text at will. Screen readers go further, reading aloud any text on a screen without a recording made in advance. Several technologies made this easier, including print on demand, ebook readers, the XML structured data format, the EPUB3 format, and the Internet. The same digital shift reshaped how ordinary books reach readers. Print on demand machines print straight from digital files onto paper, much like an office printer, allowing as few as one copy at a time. That capacity made self-publishing more affordable and let low-selling titles stay in print. It also cut the waste of mass-printing, where books must be produced and stored in advance of any order.
Since 1970, the International Standard Book Number has given a unique identifier to every edition of every book from participating publishers worldwide. An ISBN has four parts: a country code, a publisher code, a title code, and a check digit that can run from 0 to 9 or X for 10. Bookland barcodes are derived from the ISBN by prefixing 978 and recalculating the check digit. The system is not universal. Many government publishers, in both industrial and developing countries, issue books without ISBNs. Larger collections need a catalogue, and call numbers placed on each spine tie a book to that catalogue and fix its place on the shelf. Two systems dominate: the Dewey Decimal System and the Library of Congress Classification system. Both lean toward subjects well represented in US libraries when they were built, so both struggle with newer topics like computing or with subjects from other cultures. In 2011, the International Federation of Library Associations and Institutions created the International Standard Bibliographic Description to standardize entries in bibliographies and catalogs. English-language publishing today is led by the so-called Big Five: Penguin Random House, Hachette Book Group, HarperCollins, Simon and Schuster, and Macmillan Publishers, estimated to hold almost 60 percent of the general-readership market in 2021. Yet the same object that publishers organize and sell can also be suppressed. Authoritarian governments including the People's Republic of China, Nazi Germany, and the Soviet Union have censored books to silence dissent, and the authors of banned works have faced exile or even execution.
Common questions
What is the definition of a book?
A book is a written work of substantial length created by one or more authors, broadly classified into fiction and non-fiction. UNESCO in 1964 defined it as a non-periodical printed publication of at least 49 pages, excluding cover pages. The historian James Raven preferred a broader definition: a portable, durable, replicable and legible means of recording and disseminating information.
How many books have been published in total?
Google Books estimated in 2010 that roughly 130 million total unique books have been published.
What were the earliest forms of the book before printing?
The earliest forms included clay tablets, papyrus scrolls, and the codex. Cuneiform tablets were created circa 3200 BC during the Uruk period in modern-day Iraq, and Ancient Egyptian scribes wrote hieroglyphs on papyrus scrolls. The codex, with sheets bound along one edge, is the ancestor of the modern book.
Who invented movable type for printing books?
The Chinese inventor Bi Sheng made movable type of earthenware around 1045, though no examples of his printing survive. Around 1450, Johannes Gutenberg independently invented movable type in Europe, along with innovations in casting type from a matrix and hand mould.
When did ebooks and audiobooks become popular?
The first widely accepted ebook came in 1971 when Michael Hart started Project Gutenberg. Ebook readership spiked during the COVID-19 pandemic, and OverDrive reported 662 million digital items borrowed in 2023. U.S. audiobook sales reached 2.22 billion dollars in 2024, a 13 percent increase over the previous year, with an estimated 270 million monthly listeners worldwide.
What is an ISBN and how is it structured?
An ISBN, or International Standard Book Number, is a unique identifier for every edition of every book from participating publishers, in use since 1970. It has four parts: a country code, a publisher code, a title code, and a check digit that can take values from 0 to 9 or X for 10. Bookland barcodes are derived from the ISBN by prefixing 978 and recalculating the check digit.
Which publishers dominate English-language book publishing?
English-language publishing is dominated by the so-called Big Five publishers: Penguin Random House, Hachette Book Group, HarperCollins, Simon and Schuster, and Macmillan Publishers. They were estimated to make up almost 60 percent of the market for general-readership books in 2021.
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