Rough country - John Sandford

Virgil Flowers heads north to solve a puzzling murder - and finds that the country is very rough indeed.
While competing in a fishing tournament in a remote area of northern Minnesota, Flowers gets a call from Lucas Davenport asking him to investigate a murder at a nearby resort, where a woman has been shot while kayaking. The resort is for women only: a place to relax, get fit, recover from plastic surgery and commune with nature. As Flowers starts to ask questions, he finds a web of connections between the people at the resort, the victim and some local women, notably a talented country singer. And the more he digs, the more he discovers the resort to be a hotbed of jealousy, blackmail, greed, anger and fear. And then he discovers that this is not the first murder, that there was a second, seemingly unrelated killing the year before. And that there's about to be a third, definitely related one, any time now. And as for the fourth ... well, Virgil had better hope he can catch the killer before that happens. Because it could be his own.