This book was amazing from start to finish. I admired author, Steve Sheinkin, for his wonderful book, "The Port Chicago 50", but "Undefeated" has turned me into an unabashed mega-fan. Sheinkin's writing style is amazing. I don't give a crap that his non-fiction is intended for young adults, they're easily accessible, filled with pictures, great writing, and eloquence, perfect for adults too. I learned SOO MUCH from this book. I had heard of Jim Thorpe and Pop Warner but I didn't really know diddly squat about them, let alone anything about the Carlisle Indian School Football Team. I'm not huge into sports, but that didn't matter, everything in this book was fascinating, from the beginnings of football, the ill treatment of Native Americas to the awful boarding schools forced on many of their children that wiped out language, dress, and cultural ties to their heritage; this book was a sports and history lesson rolled into one. WONDERFUL!