in one's book

1. 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.

Example Sentences

"You are pleased to be pleasant upon them that have not the luck to be as book-LARNED as yourself, Mr. Grant; but I take it, being only a plain spoken Englishman, as I observed afore, that one is to the full as like to find a raspberry in one's garden as in one's book, Mr. Grant."

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