a record of bets made on whether something will happen, somebody will win a race, et cetera.
Idiom(s) section. be in somebody’s good/bad books (informal) used to say that somebody is pleased/annoyed with you: I’m in her good books at the moment because I cleared up the kitchen. bring somebody to book (for something) (formal, especially British English) to punish somebody for doing something wrong and make them explain their behaviour by the book following rules and instructions in a very strict way: She always does everything by the book. in my book (informal) used when you are giving your opinion: That’s cheating in my book. (be) on somebody’s books (to be) on an organization's list, for example of people who are available for a particular type of work: We have very few nurses on our books at the moment; Most of the houses on our books are in the north of the city. throw the book at somebody (informal) to punish somebody who has committed an offence as severely as possible—more at CLOSE1 verb, CLOSED, COOK verb, HISTORY, JUDGE verb, LEAF noun, OPEN adjective, READ verb, SUIT verb, TRICK noun.