Vengeance

Quirke finds himself at the center of a deadly intergenerational feud in the latest novel from Booker Prize-winning "literary polymath" (The New York Times) John Banville

Two men go sailing off the coast of Ireland. Only one comes back, claiming the other shot himself. But Detective Inspector Hackett and his friend Quirke aren't so sure...
The dead man is the patriarch of the powerful Delahaye family; the survivor is the scion of the Clancy family, their longtime rivals turned resentful business partners. As Quirke and Hackett investigate the death, they become embroiled in this multigenerational entanglement, encountering a host of characters at the heart of the mystery: Mona, Delahaye's beautiful, vicious young widow, his enigmatic identical twin sons, and Jack Clancy, his resentful, downtrodden, womanizing partner. But when a second, even more shocking death occurs, it becomes clear that terrible secrets undergird the families' world—secrets which Quirke will need to uncover if he wants to prevent more deaths.