(transitive) To book or reserve something for two people simultaneously. / (reflexive) To make arrangements to do two things at the same time, such that it is impossible to keep both arrangements.

simple past tense and past participle of double-book

To alter financial records in order to commit fraud, tax evasion or theft.

plural of cheque book

plural of mug book

A book containing mug shots, pictures of faces.

plural of book entry

A waterproof book for children that can be read in the bath.

plural of bath book

A book providing factual information. / (libraries) A book that can be consulted in the library but cannot be borrowed.