Linked from
The 8 pages that link to Book, each with the reason it gives.
PaperRelated: Paper sheets enabled the codex to become a widely produced format.
CodexNarrower topic: The codex is one physical form within the broader category of books.
WritingRelated: Books make extended writing portable and reproducible.
Book reviewNarrower topic: The work under review supplies the content and form being assessed.