Quite interesting and I'm having a hard time putting this book down in fact. Its kind of surprising for me as I don't normally read crime investigation novels. I'm finding it very well written and very entertaining.
It does mention in the book that the main investigator (Priest) has OCD. I wouldn't think that it would be an issue as it would be an asset. Its part of what I think makes him a great investigator as he's putting the pieces together.