I bought this to read on a long flight after I forgot to pack my ebook reader. It's not an in-depth look at the psychology at all, unfortunately. The author divides serial killers into four categories, and then provides a list of famous killers and a 'bio' of them that's a few pages long.
I'm more than halfway through and I've spotted some errors with dates/ages already, which is quite jarring.
I'm not sure who this book is for. On the one hand, there were some cases that were new to me, but I'm more interested in criminal psychology than true crime. I'm pretty sure my true crime loving friends would want much more information about each case. As someone who made an impulse buy because of the "dive into the minds" tagline, I was disappointed that the psychology side was almost non-existent.
I'm giving it two stars because it's an easy read and kept me entertained on a flight, but it's not something worth bothering with for 'research'.