Radical Candor is a book that teaches one key skill that makes a bad manager good (that is, the idea of radical candor itself) but is then filled with techniques that only good managers can use to become great.
Not beginner friendly!
Conversation
Replying to
Giving impromptu feedback takes a good manager to great. It makes a bad manager (who doesn’t know how to delegate, train, prioritise or do regular one on ones) worse.