Chelsea Cain steps into a crowded, blood-soaked genre with Heartsick, a riveting, character-driven novel about a damaged cop and his obsession with the serial killer who...let him live. Gretchen Lowell tortured Detective Archie Sheridan for ten days, then inexplicably let him go and turned herself in. Cain turns the (nearly played out) Starling/Lecter relationship on its ear: Sheridan must face down his would-be killer to help hunt down another. What sets this disturbing novel apart from the rest is its bruised, haunted heart in the form of Detective Sheridan, a bewildered survivor trying to catch a killer and save himself. --Daphne Durham Questions for Chelsea Cain Amazon.com: Gretchen Lowell haunts every page of Heartsick. Even when she actually appears in the jail scenes with Sheridan, she reveals nothing, and yet it's obvious she's anything but one-dimensional. What is her story? Cain: I purposely didn't reveal Gretchen's past, beyond a few unreliable hints. I thought there was a really interesting tension in not knowing what had driven this woman to embrace violence so enthusiastically. The less we know about killers' motives, the scarier they are. Maybe that's why people spend so much time watching 24-hour news channels that co