Blood Is the Sky
by Steve Hamilton
Reluctant investigator Alex McKnight finds himself drawn by friendship into a long drive north. The brother of Alex's longtime Ojibwa friend Vinnie LeBlanc works as a hunting guide, serving the rich clients from downstate. It seems that Vinnie's brother and his most recent group of hunters have vanished in northern Ontario, and Vinnie is scared enough to ask Alex to help him find them.
Great book. Very intense - living (and struggling not to be killed) survival story. One of those stories where they (more than once) "wrap up" the case, only to have it continue and intensify.