This was such an intense, can't put this book down kind of book that kept you wondering what was going to happen. I was very thrilled at the way Caleb Carr wrote this novel using the historical accuracy of how men like Dr. Laszlo Kreizler were treated by outsiders not in the early field of psychology, the personality of Teddy Roosevelt, and the language used in the time period. This is defiantly one book I highly recommend for any crime/mystery fan that needs something new and refreshing.