There's no such thing as a free cruise in Cuban-American author Teresa Dovalpage's addictively clever new Havana mystery. Cuban-born Mercedes Spivey and her American husband, Nolan, win a five-day cruise to Cuba. Although the circumstances surrounding the prize seem a little suspicious to Mercedes, Nolan's current jobless status and their desperate need to revamp their marriage make the decision a no-brainer. Once aboard, Mercedes...