Book

A Book was comprised of words or pictures written in ink (or a similar stain) on sheets of paper (or a similar material) that were bound together. (TV: Human Nature, ''Silence in the Library / Forest of the Dead')

Books could cover any topic and be intended for entertainment, record keeping, teaching, or other purposes. Some books were arranged in chapters, which could have titles listed near the front of the book. Some books had afterwards, text written after the main story was concluded. (TV: The Angels Take Manhattan Some books had date of publication information. Books could be reprinted, and editions of some books were printed as late as the year 5000000000. (TV: The Unicorn and the Wasp'')

Books were commonly, but not exclusively, stored in a library.

Appearances
Artie Maitland was reading a book called Summer Falls by Amelia Williams. Clara Oswald said she'd read it, too, and chapter 11 was the best. (TV: The Bells of Saint John)