Body Rides by Richard Laymon is $0.99 at Amazon. I've read a lot of Laymon, though I haven't read this one yet.
Neal has been carrying a gun in his car lately—just to be safe. And it looks like it's a good thing he has. When he spots a woman tied naked to a tree and a man ready to kill her, he has no choice but to shoot the attacker. As a reward, the woman gives Neal something unimaginable.
Neal's reward is a bracelet. A very special bracelet. It enables its wearer to step inside other people, to see through their eyes, to feel whatever they feel. To take "body rides." But Neal has a big problem. The man he shot isn't dead. And he wants revenge. First he's going to finish what he started with the woman. Then he's going after Neal...