in your book

in (one's) book

According to one's opinion, judgment, or values. In my book, it's worse to run away from a fight than to start one. You kissed a girl, even though you have a girlfriend. That's cheating in my book, dude. You proved you can handle yourself in a scrap. You're OK in my book, kid.
See also: book
Farlex Dictionary of Idioms.

in your book

COMMON You use in my book to state your own belief or opinion about something. People can say what they like, but in my book he's not at all a bad chap. I wanted him to call the police. In my book a violent woman's just as dangerous as a violent man. Over-involvement with the client was a major crime in her book.
See also: book
Collins COBUILD Idioms Dictionary, 3rd ed.
See also:
  • in (one's) book
  • in book
  • in my book
  • in one's book
  • in somebody's book
  • (one's) bark is worse than (one's) bite
  • kiss (one) on (some place)
  • kiss on
  • at the end of (one's) fingertips
  • thrust away from (someone or something)
References in classic literature
"I," said Don Quixote, "have some little smattering of Italian, and I plume myself on singing some of Ariosto's stanzas; but tell me, senor- I do not say this to test your ability, but merely out of curiosity- have you ever met with the word pignatta in your book?"
Don Quixote