Waltz of Shadows — Joe R. Lansdale

Bill, a jobless 24-year-old, is in desperate trouble. He's being framed by some very unsavory acquaintances for a series of sadistic murders, and is in possession of a particularly gruesome photo album. Backed into a corner, he calls his uncle Hank, and in the process draws the mild-mannered family man into a dark world of unspeakable horror, where people with names like Fat Boy and Snake trade in child pornography, rape, arson and murder. Suddenly Bill's problems have become Hank's, and, with everything on the line, Hank and his estranged half-brother Arnold find that they only have each other to rely on.