Just finished my third reading of The Making of the Atomic Bomb by Richard Rhodes. It really ruined most other history books for me by setting the bar so high.
It doesn't just describe the debate about dropping the bomb - it details the bombings of Dresden and Tokyo and other cities from the perspective of the survivors, the crews of the bombers as well as the leaders who ordered the bombings. It describes the resistance of the Japanese at Iwo Jima and other battles which cemented the belief that invading the Japanese homeland would be a bloodbath. And the chapter about the immediate aftermath of the atomic bombs as told by contemporary accounts is gutting.
Even this description is completely omitting a huge part of the book. It's a 53 hour audiobook with zero fluff.