Way Down on the High Lonely — Don Winslow

FROM DOMESTIC WAR TO BARROOM BRAWLS, GRAD-STUDENT-TURNED-P.I. NEAL CAREY'S GOT MORE THAN STUDYING ON HIS PLATE.
Graduate student Neal Carey's three year confinement in a Chinese monastery is finally over … but his troubles are just beginning. The elusive financial benefactors who have bought his freedom expect a return on their investment. They want him to find Cody McCall, a two-year-old boy recently abducted by his father in a bitter Hollywood custody battle … a task that will propel Neal from the glittering Hollywood hills to the remote wilds of Nevada.
To find Cody, Neal has to turn outlaw in a land of two-bit casinos and roadside cathouses, and infiltrate a vicious white supremacist group spouting hatred and dealing in terror. But the deeper undercover he goes, the deadlier the game becomes. Now Neal must force a showdown with the group's crazed leader and find Cody before the missing toddler ends up lost in a world of unspeakable evil.