A quick book explaining the backstory of most of the countryhumans in my AU!

Germany, troubled by his past, decides to build a time machine and travel back to 1933 Germany to try to stop an event that would change the entire course of history. With this plan, he must sacrifice his power and wealth in the present... This story is NOT supposed to be entirely historically accurate! This story will contain mentions of violence, naziism, death, and blood. Read at your own risk!