I am in my third reading of this entire series.  While I really like both Kaden and Tansy, other reviewers have commented on the overt dominance/submission feeling of this book, which I somewhat agree with. But I don't think it goes overboard. He is a very strong male lead, she is strong in a softer but more persistent way ... and the twists and turns of the story, as well as the involvement of other Ghostwalkers who have their own books make Murder Game a solid read.  I don't read series over again because I am bored or out of new material ... I like re-visiting stories of familiar friends!