An interesting look at commonalities among serial killers (did you know a longer third toe is common for serial killers?!?) and a virtual scolding of the parties that the author deems responsible for missed opportunities to recognize and treat sociopaths destined to kill without remorse.
For me, the best part was the "In their own words" section where serial killers told their stories. I did not look for truth in their words, rather for hints at the basis for self-serving mentality and lack of empathy.
I would recommend this book for anyone curious about the type of human that is driven to kill for reasons not apparent to normal humans.