A book is a set of written, printed, illustrated, or blank sheets, made of ink, paper, parchment, or other materials, usually fastened together to hinge at one side.
A book is a set of written. Written is printed. Written is illustrated. Blank sheets usually fastened together to hinge at one side. Blank sheets are made of ink. Blank sheets are made of paper. Blank sheets are made of parchment. Blank sheets are made of other materials.