A Testament to Murder: A 1920s murder mystery to keep you guessing until the final page

At the lush Villa Calypso on the French Riviera, a dying billionaire launches a devious plan: at midnight each day he appoints a new heir to his vast fortune. If he dies within 24 hours, that person takes it all. If not, their chance is gone forever. Yet these are no ordinary beneficiaries, these are men who crossed him, women who deceived him, and distant relations intent on reclaiming the family fortune. All are determined to lend death a hand and outwit their rivals, and retired Scotland Yard detective Jasper, in pursuit of the prize.