I read a book a couple of years back that I loved. An ex (at least at the beginning of the book) us special forces guy is driving along a rainy highway and picks up a female hitchhiker who turns out to be a prostitutes that's escaped a murderous pimp. The guy and girl begin to form a relationship and the guy decides to use his special forces skills to help catch the pimp, but in the course of his investigations he ends up getting her killed and himself badly injured. The rest of the book is him being re-enlisted for a black ops rescue mission for the US government and at the same time exacting revenge on the ex prostitutes pimp and drug dealing gang. He has his own island with a pressure chamber which he uses to torture one of the drug dealers underlings at one point.
Anybody?
Anybody?