Reading Churchill's own books critically

Which three books offer a balanced understanding of Churchill beyond portrayals such as Darkest Hour?

Start with Churchill's own books, read critically as evidence of his self-presentation as well as his recollections.

Darkest Hour prompts a request for three books that would give a balanced view of Churchill. The answer recommends starting with Churchill's own writing. His accounts can reveal how he wished decisions had been made and how he wanted events remembered. That makes them useful for understanding him as a person. Their account of events should still be read critically, since personal recollection and the historical record can diverge. The response does not supply a three-title reading list.