I'm always reading something, usually multiple books at a time.
For most of the book, I felt it was on its way to a three-star rating from me. I was thinking interesting premise, writing a bit workman-like and prone to over-explaining. An example of the over-explaining:
"My name is Louise Rick," she said, holding out her hand and explaining who she was.
Isn't the "explaining who she was" part self-evident? Anyway, once the mystery unraveled in the late chapters, I felt the book strained credulity beyond its breaking point. I just kept shaking my head and thinking this is not how real human beings would behave, even in the circumstances the book presents. Also, there was a scene where Louise Rick put herself in a vulnerable position that I wouldn't expect a real police officer to do, just so she can experience a dramatic trauma. Hey, the bad guy is still on the loose, but I'm comfortable taking a closer look at his lair with no back-up!
I came to this book with no knowledge of the series that it is a part of, and therefore I cannot comment on whether the other books are any better. (Though I'd be interested to hear from anyone who does know the other books.)