Minette Walters lives here in Dorset and is one of the top crime writers. I have just read 'Disordered Minds' which is set in Bournemouth, though not a Bournemouth that I recognize. It is what you would call a psychological thriller.
Gregory House says, "Everybody lies." He is right, but in this book everyone creates a new personality for themselves. People construct a persona that makes them comfortable with themselves, even though everybody else sees through it. This makes for a fascinating read as the threads unravel and the truth is gradually revealed. The main investigator is not who he claims to be, not is the murderer. The person convicted didn't do it and one person can't remember doing it. The guilty accuse the innocent and the innocent protect the guilty, though how innocent are the innocent.
If you haven't already, read it.