The Trespasser, Tana French

Being on the Dublin Murder squad is nothing like Detective Antoinette Conway dreamed. Her working life is a stream of thankless cases and harassment. Antoinette is tough, but she's getting close to the breaking point. The new case looks like a regular lovers' quarrel gone bad. Aislinn Murray is blond, pretty and lying dead next to a table set for a romantic dinner. There's nothing unusual about her - except that Antoinette has seen her somewhere before. And her death won't stay neat. Other detectives want her to arrest Aislinn's boyfriend, fast. There's a shadowy figure at the end of Antoinette's road. And everything they find out about Aislinn takes her further from the simple woman she seemed to be.