Fear Cay: A Doc Savage Adventure (Doc Savage #11)

In a frantic chase from New York to the Caribbean, Doc and his crew meet a movie star, a surprisingly spry white-bearded sailor who claims to be a hundred and thirty years old, an eerie menace that reduces men to skeletons and a pack of villains who manage to outmaneuver Doc at every turn in their quest for a "Fountain of Youth" hidden somewhere on Fear Cay.