A problem I have with many True Crime books - and especially those written by criminal investigators, forensic scientists, and the like - is that there's a tendency for the author to come across as superior to the rest of us. Ironically, the more they proclaim to be ordinary, normal people doing an extraordinary job, the more superior sounding they often become.
And, just because someone has an incredible story to tell doesn't mean they're a great storyteller.
Mark Williams-Thomas just about gets things right. That he takes on investigations after the police have failed tells us quite a lot already (we're not dealing with a shrinking violet here), but he's not overly egotistical either.
Despite him being reasonably humble, there's a nagging frustration between the lines; he's always got a secret contact, works on 'the edge of the law' and knows more than he's letting on.
All that said, this is a decent read. His favourite cases involve missing persons and murders, but not exclusively; the author is the man who revealed Jimmy Savile's crimes to the public, so there's quite a lot about that too.
Interesting, but not world changing.