in one’s book—in the opinion of a person:
- In his book the function of television was to edify, not to entertain.
Note: The expression does not correlate in meaning with the phrase in the book—used of existing norms, laws, etc.:
- Although Daisy entertained pretentious of grandeur, her dinner party violated every rule in the book.
in someone’s books—(also: in someone’s good books) in favor with a person:
- I was so much in his books, that at his decease he left me his lamp.