Biographies or general Historical non fiction that are the de facto resource to learn about the topic

Here are multiple such books:

* *Code Name Downfall: The Secret Plan to Invade Japan—and Why Truman Dropped the Bomb* (1995) by Thomas B. Allen and Norman Polmar.
* *The Rising Sun: The Decline and Fall of the Japanese Empire,1936-1945* by John Toland.
* *Downfall: The End of the Imperial Japanese Empire* (1999) by Richard B. Frank.
* *Truman and the Hiroshima Cult* (1995) by Robert P. Newman.
* *Unconditional: The Japanese Surrender in World War II* (2020) by Marc Gallicchio.
* *The Making of the Atomic Bomb* by Richard Rhodes.
* *The Rape of Nanking: The Forgotten Holocaust of World War II* by Iris Chang.
* *Unit 731: Testimony* by Hal Gold.
* *Tennozan: The Battle of Okinawa and the Atomic Bomb* by George Fiefer.
* *Prisoners of the Japanese: POWs of World War II* in the Pacific by Gavan Daws.
* *Japan’s Secret War: Japan’s Race Against Time to Build Its Own Atomic Bomb* by Robert K. Wilcox.