The Gate House by Nelson DeMille

Tax attorney John Sutter returns home to the Gold Coast and unknowingly lives close to his ex-wife Susan. John's past affects his life today. Years ago, Susan murdered her infamous Mafia Don lover. The Don's son Anthony draws John into the violent world of the Bellarosa crime family while seeking revenge from Susan. John finds his relationship involving him in seduction and betrayals. This is a real page-turner!