The Secret of Shark Reef (Alfred Hitchcock and the Three Investigators #30)
Publisher: Random House Books for Young Readers
Published: September 12, 1979
Language: eng
Number of pages: 213
ISBN-13: 9780394842493
Genres: Children's Mystery; Children's Horror
Description: Three young sleuths uncover a mystery buried since World War II when they come to the aid of a trouble-plagued environmentalist who is protesting the drilling of off-shore oil wells.