in one's 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 one's book

According to one's opinion or way of thinking. For example, In my book he's a wonderful father. This expression alludes to a book containing a personal list of some kind. [Slang; mid-1900s] Also see black book.
See also: book
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • in (one's) book
  • in book
  • in my book
  • in somebody's book
  • in your 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)