A book is a series of pages assembled for easy portability and reading, as well as the composition contained in it. The book's most common modern form is that of a codex volume consisting of rectangular paperpagesbound on one side, with a heavier cover and spine, so that it can fan open for reading. Books have taken other forms, such as scrolls, leaves on a string, or strips tied together; and the pages have been of parchment, vellum, papyrus, bamboo slips, palm leaves, silk, wood, and other materials.
The contents of books are also called books, as are other compositions of that length. For instance, Aristotle's Physics, the constituent sections of the Bible, and even the Egyptian Book of the Dead are called books independently of their physical form. Conversely, some long literary compositions are divided into books of varying sizes, which typically do not correspond to physically bound units. This tradition derives from ancient scroll formats, where long works needed several scrolls. Where very long books in codex format still need to be physically divided, the term volume is now normally used. Books may be distributed in electronic form as e-books and other formats. A UNESCO conference in 1964 attempted to define a book for library purposes as "a non-periodical printed publication of at least forty-nine pages, exclusive of cover pages". A single sheet within a codex book is a leaf, and each side of a leaf is a page. Writing or images can be printed or drawn on a book's pages.
The Peterborough Chronicle (also called the Laud Manuscript), one of the Anglo-Saxon Chronicles, contains unique information about the history of England after the Norman Conquest. According to philologist J.A.W. Bennett, it is the only prose history in English between the Conquest and the later 14th century.The Anglo-Saxon Chronicles were composed and maintained between the various monasteries of Anglo-Saxon England and were an attempt to record the history of Britain throughout the years AD. Typically the chronicles began with the birth of Christ, went through Biblical and Roman history, then continued to the present. Every major religious house in England kept its own, individual chronicle, and the chronicles were not compared with each other or in any way kept uniform. However, whenever a monastery's chronicle was damaged, or when a new monastery began a chronicle, nearby monasteries would lend out their chronicles for copying. Thus, a new chronicle would be identical to the lender's until they reached the date of copying and then would be idiosyncratic.
Diagrams of first and third rate warships in the Cyclopaedia: or, An Universal Dictionary of Arts and Sciences (folio, 2 vols.) an encyclopedia published by Ephraim Chambers in London in 1728, and reprinted in numerous editions in the 18th Century. The Cyclopaedia was one of the first general encyclopedias to be produced in English.
After a 244-year span in print, the Encyclopædia Britannica will discontinue its published volumes. With less than 1% of revenue coming from print versions, Jorge Cauz, Britannica's president, indicates there simply is not sufficient demand for the print publication. In the last 11 years demand has plummeted due to competition from Wikipedia and Britannica's own digital version. Britannica peaked in sales in 1990 with 120,000 sets sold. The 2010 edition will be the last in print and has sold 8,000 sets to date; with 4,000 sets remaining.