The New York Times has an interesting article on the evolution of books. From the use of scrolls to the development of the codex and the invention of the printing press, books today are going through another revolution: the development of e-books.
The excerpt below deals with codex:
In the classical world, the scroll was the book format of choice and the state of the art in information technology. Essentially it was a long, rolled-up piece of paper or parchment. To read a scroll you gradually unrolled it, exposing a bit of the text at a time; when you were done you had to roll it back up the right way, not unlike that other obsolete medium, the VHS tape. English is still littered with words left over from the scroll age. The first page of a scroll, which listed information about where it was made, was called the “protocol.” The reason books are sometimes called volumes is that the root of “volume” is volvere, to roll: to read a scroll, you revolved it.
Scrolls were the prestige format, used for important works only: sacred texts, legal documents, history, literature. To compile a shopping list or do their algebra, citizens of the ancient world wrote on wax-covered wooden tablets using the pointy end of a stick called a stylus. Tablets were for disposable text — the stylus also had a flat end, which you used to squash and scrape the wax flat when you were done. At some point someone had the very clever idea of stringing a few tablets together in a bundle. Eventually the bundled tablets were replaced with leaves of parchment and thus, probably, was born the codex. But nobody realized what a good idea it was until a very interesting group of people with some very radical ideas adopted it for their own purposes. Nowadays those people are known as Christians, and they used the codex as a way of distributing the Bible.
One reason the early Christians liked the codex was that it helped differentiate them from the Jews, who kept (and still keep) their sacred text in the form of a scroll. But some very alert early Christian must also have recognized that the codex was a powerful form of information technology — compact, highly portable and easily concealable. It was also cheap — you could write on both sides of the pages, which saved paper — and it could hold more words than a scroll. The Bible was a long book.
Read the article in its entirety here.