idiom
C2
If someone is in your good books, you like them; if they are in your bad books, you are upset with them.
After helping her with the chores, I can tell I’m in her good books now.
그녀의 집안일을 도와준 후, 이제 그녀의 좋은 책에 있다는 것을 느낍니다.
translation
누군가의 좋은/나쁜 책에 있다