One of my favorite books. So weird how two famous figures could be so opposite and yet so similar: https://www.amazon.com/Crazy-Horse-Custer-Parallel-American-ebook/dp/B00KQZY19A/ref=sr\_1\_1?crid=4OAA9RAZZZID&keywords=custer+and+crazy+horse&qid=1658868291&sprefix=custer+and+craz%2Caps%2C1868&sr=8-1
His story is pretty fascinating. This is a great book on both him and Crazy Horse - https://www.amazon.com/gp/product/B00KQZY19A/ref=kinw_myk_ro_title