My Soul to Take by Yrsa Sigurdardottir

Client Jonas Juliusson hires lawyer Thora Gudmundsdottir to visit the spa-hotel she helped him purchase because he believes one of the buildings is haunted and that the sellers knew this before the sale. With business slow and needing the money, Thora agrees to head to Snaefellsnes to check it out. Soon after arriving, the female architect, Birna, that Jonas had hired to help with the renovations is found murdered. Thora is intrigued by who could have killed Birna and starts digging into what she was working on. Thora also becomes interested in the history of the family that lived on the land before it was sold and finds it steeped in tragedy. With the help of German boyfriend, Matthew (whom Thora met in the first book in the series Last Rituals), she tries to uncover the murderer while dealing with the stress that comes along with being a divorced mother of two.