If you are talking about a hard copy composition of papers, usually bonded together with a cover, it would probably be a solid.
The solid shape for a book is a cube
solido
solid
a book
solido
A book is considered a solid object, not a substance. It is made up of paper, ink, and binding materials that give it its physical form.
Go read a book
desk,ruler,book
being one who read the book i think that the better book is "twilight" as the story is more rock solid
Online at First Tuesday Book Club
A tape measure or ruler, A book on solid geometry, A calculator or computer.
book brick shoe wall floor