In Pursuit of the Proper Sinner (Inspector Lynley Mystery, Book 10)
When two bodies are found in a prehistoric stone circle questions are asked why they died. As the police start digging into the characters you find that the lives of the characters are convoluted and involved and very human. Add to that some backgrounded stuff with Lynley and one of his underlings Barbara Havers and you find that the long book travels quite quickly.
I enjoyed the read, it could maybe have been edited a bit down from the over 700 pages but I'm not sure you'd have lost a lot of information. Made me inclined to find more of this series.