It's nice to read a thriller once in a while. It has good beginning, gory details and interesting historical persona. The pacing could be better especially when the character was showing off to the other about something he realized before the other. How the explanation was dragged was not so fun to read after two or three occurrences. Couldn't say I like the ending, it's forcing too much the image of obsessed scientist. Otherwise interesting enough story about criminal profiling at the time before detective and police TV series boom.