As much as a book holds.

The qualities that make a book what it is.

A notebook or memorandum book. / A subordinate book containing notes or jottings to be afterward extended in due form.

(intransitive, idiomatic) To check in (to a hotel). / (transitive) To reserve an appointment for.

plural of bookful

A surname.

(theater) Acting as prompter.

present participle of book it

simple past tense and past participle of book it

(colloquial, with regard to income) Undeclared for tax and social insurance etc.