A book containing religious prayers / (when capitalized) The Book of Common Prayer / (nautical) A small holystone

(authorship) Electronic book, a book published in electronic form.

(rare, perhaps archaic) Alternative form of bookworm

A personal notebook or journal in which memorabilia, quotations, etc., are written.

(arachnology) A lamellate respiratory organ found in arachnids.

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

(theater) Able to perform scripted material from memory, without need to refer to the text. / (accounting) Off the books, not officially recorded.

The Bible, or by extension the scripture of another religion.

plural of guide book

(transitive, idiomatic, informal) To charge with or convict of as many crimes as possible. / (transitive, idiomatic, informal) To apply the harshest possible punishment to.