"Superb characters, sparkling dialogue, and a gripping, terrifying plot, plus flashes of humor to boot; JoAnn Chaney's What You Don't Know has it all." --Chris Pavone, New York Times bestselling author A series of murders brings Denver to its knees in this wonderfully voice-driven, dark, wry, and wholly original page-turning debut. He didn't take their lives -- but he ruined them. The final victims of an infamous serial killer may be the ones he didn't kill. Hoskins cracked the case of one of the most infamous serial killers -- and then it cracked him. He's in cold cases, as is his career. Sammie was the lead reporter who broke the story, but now she's selling makeup at the mall. She wants back on page 1. Gloria claims she was the unsuspecting wife. She didn't know a thing. And as new murders shake Denver, this is a final chance to get their lives back.