Ghostheart — R.J. Ellory

Annie O'Neill has it all: a cozy Manhattan apartment, a beautiful bookshop, and a network of supportive friends―but her father died in her childhood, leaving a hole she has yet to fill. When a mysterious man named Forrester enters the shop and claims to be her father's oldest friend, she jumps at the chance to discover more. But Forrester seems much more interested in telling her a story about a ruthless ganglord and a decades-old betrayal. A betrayal that, she will realize far too slowly, has something very much to do with her.