Blood Mist — Mark Roberts

DCI Eve Clay got the call at five minutes to midnight. A family of six, slaughtered in their beds, their bodies dragged out to the landing to form an arcane pattern. Outside, a blizzard rages past the well-kept houses of The Serpentine. None of the neighbors heard a sound. Someone took great care to arrange those bodies so precisely. But who? And why? Somewhere in Eve's minds, a long-buried memory flickers. But there is no time for hunches. She must find the killers before they strike again. As Liverpool holds its breath, DCI Eve Clay hunts a ruthless killer who knows more about her past than she does.