End of Story – A. J. Finn

house filled with secrets… Young writer Nicky Hunter is summoned to the lavish mansion of infamous crime novelist Sebastian Trapp to tell his life story — before his imminent death. And then a body is found… Who really is Sebastian Trapp? Misunderstood genius or cold-hearted killer? What really happened to his first wife and young son, who disappeared twenty years ago? You’ll never guess the secret.You’ll never forget the twist.