There's nothing better than finding a good new series character in the thriller genre. Elena Forbes' Mark Tartaglia, a London murder squad detective, fits the bill very satisfactorily. He's a bit like an English version of Connolly's Harry Bosch, set in a realistic West London backdrop.
Tartaglia is faced with a sadistic murderer who mutilates his victims using the unkindest cut of all - castration - but the motivation is unclear. The story is a gripping one and involves a satisfyingly complex number of strands, including a couple of very unexpected plot twists before the exciting denouement. The characters are highly believable and the relationships and interaction between them are as interesting as the storyline; an essential part of a good thriller.
Now I look forward to enjoying the other two in the series...