First off, I am a fan of RJ Parker's true crime writings. I don't even bother to read the book descriptions before buying - I've read several other Parker ebooks and loved them, so I bought this one without thinking twice. Unfortunately, I was disappointed for several reasons:
1) The book starts out as 'serial killers for beginners.' The unsolved killings don't actually start until Chapter 8. Given the title, I felt that the extra information took up too many pages, given the short length of the book.
2) A lot of the information is very repetitive throughout the first seven chapters, and most of the unsolved killer chapters end with the same comments, such as "Did the killer die? Go to jail for another crime? We may never know"
3) The amount of grammatical errors, many of which I believe would be picked up in most spell-checkers. There was even a sentence with a word missing, when it was describing the location of a small town -- "just of I-10" or something along those lines. North? East? Who knows.
Unfortunately, the sad truth of unsolved crimes is that usually very little information is available. This is not due to lack of the author's research and I don't feel that it is fair to give poor reviews based on this alone. There are even some comments from the author about how little information was available on certain cases.
I would gladly give the book four or five stars if an update is issued to amend the repetition and grammatical errors. If you did enjoy this book, I highly recommend "Social Media Monsters: True Stories of Internet Killers" or "Parents Who Killed Their Children: True Stories of Filicide."