A cache of diamonds is stolen in Phoenix The prime suspect is former Maricopa County Sheriff Mike Peralta now a private investigator Disappearing into Arizonaxs mountainous High Country Peralta leaves his business partner and longtime friend David Mapstone with a stark choice He can cooperate with the FBI or strike out on his own to find Peralta and what really happened Mapstone knows he can count on his wife Lindsey one of the top xCgood hackersxD in law enforcement But what if theyxve both been betrayed Mapstone is tested further when the new sheriff wants him back as a deputy putting to use his historianxs expertise to solve a very special cold case The stakes turn deadly when David and Lindsey are stalked by a trained killer whose specialty is xCsuicidingxD her targets In depressed post-recession Phoenix every certainty has become scrambled from the short hustle of the powerful real-estate industry to the loyalties Mapstone once took for granted Could Peralta really be a jewel thief or worse The deeper Mapstone digs into the world of sun-baked hustlers corrupt cops moneyed retirees and mobsters the more things are not what they seem Ultimately Mapstone must risk everything to find the truth High Country Nocturne is an ambitious searing and gritty novel with a fast-paced story as hard-edged as the stolen diamonds themselves.