Something mysterious is killing the wildlife in the desert hills just south of Tucson, Arizona. When Emma Perez, a college-intern-turned activist, sets out to collect her own evidence, she too ends up dead. Local law enforcement seems slow to get involved. That’s when the mobile FBI unit goes undercover to infiltrate the town and the copper refinery located there in search of possible leads. Costa and Quinn find themselves scouring the desolate landscape that keeps on giving up clues to something much darker—greed, child trafficking, other killings. As the body count continues to add up, it s clear they have stumbled on more than they bargained for. Now they must figure out who is at the heart of this mayhem and stop them before more innocent lives are lost. Brennan s latest novel brims with complex characters and an ever-twisting plotline, a compelling thriller that delivers.