I've read a substantial amount of material about World War II, but the majority of it covered the European war or the Holocaust, so this book about an airman in the Pacific theatre was somewhat new territory for me.
To be honest, though, this is less of a history of World War II than it is a somewhat-biography of Louie Zamperini - grade school troublemaker, Olympic athlete, World War II bomber crew member and Japanese POW-camp survivor. Hillenbrand does an excellent job of explaining such diverse topics as track and field, WWII aircraft, the Japanese code of honor, POW camp conditions, even mid-century Christian evangelism, but where this book really shines is in how it shows those subjects through the eyes of Zamperini, how it takes him from hoodlum to track star to airman to POW, and especially how it shows the effects his experiences in Japan had on him post-war. This was easily one of my favorite historical reads.
A (not so) quick final note: It did take me almost three weeks to read the book, which is quite a bit longer than my average book time. One shouldn't assume from this that the book was difficult to read; on the contrary, the author's writing style lends an almost narrative feeling to the book (except in sections filled with statistics on airplane accidents or POW survival). I found myself involved in several other outside projects and had little time at some points for leisure reading. It's a testament to Hillenbrand's skill that I was able each time to quickly jump back into the action of the book.