( informal ) used when you are giving your opinion :
That's cheating in my book.
IN MY BOOK
Meaning of IN MY BOOK in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005
( informal ) used when you are giving your opinion :
That's cheating in my book.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005