“Mila 18” by the author, Leon Uris. Not only a fantastic read about the uprising, but a truly invaluable preparatory resource for the times ahead.
Rabbi Klonimus Kalman Shapira’s Aish Kodesh, found among the Warsaw Ghetto archives, and published posthumously, is available in English now. I have it in Hebrew.
https://www.feldheim.com/aish-kodesh-hebrew-only-1-1
A short story written by an actual participant in the rising is also available in English.
Yosl Rakover Talks to God Paperback – October 10, 2000
QB VII was most horrendous
at the time