Book excerpt: Catching the killer is just the beginning in the outstandingly dark debut, What You Don't Know, from rising grip-lit star, JoAnn Chaney. Do you really know your neighbours? Jacky Seever was a beloved local businessman and pillar of the Denver community. Until thirty-one bodies were discovered in the crawlspace of his house. Detective Paul Hoskins was lauded for bringing down one of the most ruthless serial-killers of the decade. Sammie Peterson, the lead reporter on the case, finally obtained the success she craved. And Seever's wife, Gloria? Well, she claimed to be as surprised as everyone else. But when you get that close to a killer, can you really just move on?