Karma Doll by Jonathan Ames (Author)

After narrowly escaping with his life at the hands of a murderous Hollywood pimp, detective Happy Doll, bullet-ridden but healing, has landed on a remote Mexican beach. In a humble shack and with his dog for company, Doll settles into a peaceful idyll of Buddhist study. But then trouble, as it always does, comes to paradise.  Doll is the witness to a murder for which he is framed, and now, with an expired passport and the Mexican authorities on his tail, he must sneak across the border back to L.A. by any means necessary, with the goal of bringing the true murderer to justice.