Cloudland by Joseph Olshan
While out walking during an early spring thaw, Catherine Winslow discovers the body of a woman leaning against an apple tree. From the corpse’s pink parka, Winslow recognizes her as the latest victim of a serial killer, a woman reported missing weeks before during a blizzard. When her neighbor, a forensic psychiatrist, is pulled into the investigation, Catherine begins to discover some unexpected connections to the serial murders. One is that the murders might be based on a rare unfinished Wilkie Collins novel that is missing from her personal library. The other is that her much younger lover from a failed affair has unexpectedly resurfaced and is trying to manoeuvre his way back into her affections.