This book, ninth in the "Mysteries in Our National Parks" series, is set in the Virgin Islands National Park. The authors deftly weave information about endangered coral reefs and hawksbill turtles into the story, as well as Caribbean culture and history: Jumbies (evil spirits), basket-making, sugar plantations, the 1733 slave revolt, Haitian Macoutes, and the smuggling of illegal aliens from Haiti to the Virgin Islands. A map of the park and an afterword by a marine ecologist are included. The story's politically-correct ending is somewhat unbelievable, but the story will appeal to middle grade students reading at approximately fifth-grade level. ( )