“book”

A collection of sheets of paper bound together to hinge at one edge, containing printed or written material, pictures, etc.

In a manner which strictly adheres to rules, legal requirements, or official procedures.

A unit of time of one twenty-fourth of a day (sixty minutes).

To announce or record one's own arrival at a hotel, airport etc.

To record the departure or withdrawal of someone or something (such as guests, employees, books, etc.).