Devious by Lisa Jackson

Valerie Houston is in New Orleans running a B & B with her friend and also wanting to hear from her sister Camile, who has joined the convent at St. Marguerite. When Sister Camile is found murdered, Valerie is horrified. Determined to discover what happened to her, she digs into the convent, the other sisters, and Camile's boxes of stored things. Detective Montoya is shocked to find the killing of Camile and the residents of the convent more like old home week school reunion. Former lovers and classmates are thrown together, stirring up memories, some he'd like to forget. Will Valerie find out who murdered Camile? Will she and her husband reunite? Are things as dark and sinister at the convent as they seem? Jackson writes a thrilling murder mystery, sure to keep you up nights until you finish the last page. A good read.