Biker. A Noir Mystery (en Inglés) - Mike Baron

MASTER OF THE ACTION ADVENTURE GENRE, MIKE BARON DELIVERS THE FIRST BOOK IN THE INTOXICATING BIKER SERIES. 

Josh Pratt is an ex-con turned private investigator. Ginger Munz, a woman dying of cancer, hires him to find the son she lost as a baby. The child's father is a sadistic sociopath named Moon who has vowed to kill her and Josh's girlfriend, Cass, for ratting him out. The trail leads to the Sturgis Motorcycle Rally and west into no-man's land, where Josh learns the monstrous fate of the stolen child. 

Josh is "The Biker," caught up in a race for survival against a human monster on the road between heaven and hell...at the end of which lies either salvation or damnation. 

Baron spins a tale of unrelenting suspense and horror that moves across his narrative landscape like the roar of a chopper's engine.