A book is a medium for recording information in the form of writing and images, typically composed of pages that are bound together and protected by a cover. The technical term for this physical arrangement is codex. A single sheet in a codex is a leaf, and each side of a leaf is a page. In the history of hand-held physical supports for extended written compositions or records, the scroll dominated the written world prior to the codex. The Top 100 greatest books of all time determined by 96 lists and articles from various critics, authors and experts.