The Girl With a Clock for a Heart by Peter Swanson

George Foss lives a pretty ordinary life as an accountant at a literary magazine and at 40, has never married or had children. When he glimpses his college girlfriend, Liana, at a bar, it throws him off-balance because throughout the last twenty years he's had moments where he thought he had seen her, but it was not the case. Liana cast a spell over George all those years ago and it hasn't dissipated. Despite knowing that she's possibly a murderer and is wanted by the police, he agrees to meet up with her. Liana wants George's help in returning money that she stole from a wealthy businessman she was seeing. George agrees to aid Liana, but finds himself deeply involved in violence and murder. A fast-paced, unputdownable thrill ride. It's like a noirish Harlan Coben/Linwood Barclay.