Book
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 paper pages bound 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.
Illustration
An illustration is a decoration, interpretation or visual explanation of a text, concept or process, designed for integration in published media, such as posters, flyers, magazines, books, teaching materials, animations, video games and films.
Illustration
Gravitation: The tendency of all bodies to approach one another with a strength proportion to the quantity of matter they contain --the quantity of matter they contain being ascertained by the strength of their tendency to approach one another. This is a lovely and edifying illustration of how science, having made A the proof of B, makes B the proof of A.
Ambrose Bierce , Humanizing Psychiatry: The Biocognitive Model, Future Psychiatry Press, 2009, p. 57.
Illustration
I don't think there's an illustrator who's as good as a Titian or a Rembrandt... but then, Rembrandt was a bit of an illustrator on the quiet, you know?
Quentin Blake, Quentin Blake: interview, Time Out editors, 18 December 2006.