I'll be honest in saying that after reading a couple of his books I find a lot of repetition in them but one can hardly blame the author for trying to write something that will sell.

Overall I'd have to day his book on the motives of killers, bombers, arsonists, rapists, and other criminals is probably a more useful book. There really is a fairly straightforward set of things to watch for in kids for example that point towards the need for intervention so that book more than this one hit some useful areas.

The other thing about his books that I really don't fault him for but which I would comment on is the historical element of his career as a pioneer in the field of behavior profiling. The idea for what they created might be dated back to Sherlock Holmes for instance but the difference is that it was in Douglas tenure that they formalized it beyond common sense deduction to a formal study over many years of inmates serving time for some of the worst crimes in American history. That is what the book is about although by and large there are so many of them Douglas can deal with each one only briefly and in a generalized sense. Of course this does reflect the reality of the mass media killer era where you do in essence have to start with a generalized idea of motivation based on known facts and an unknown subject or unsub.

For a better look at specific cases and their historical impact on regions and the country one should look for books on the specific cases he is talking about which is another thing to point out. Many of the cases he worked in his career are the most famous cases in modern American history so in a sense by not delving into overly much detail he avoids covering territory others have already written about such as the Green River Killer, the Unabomber, the Chicago Tylenol poisonings, the Atlanta Child Murders, and the list goes on.