Brother detectives Frank and Joe dive deep into the Florida Keys to find a missing person in the twenty-first book in the thrilling Hardy Boys Adventures series.
The boys get to go on an all-expenses paid trip to the lush and beautiful Florida Keys to help save sharks But the trip\'s purpose is suddenly sidelined when a paddle boarder goes missing and rumor.
Frank and Joe Hardy have been invited to take part in a conservation mission by a marine biologist at the Bayport Aquarium.
Brother detectives Frank and Joe dive deep into the Florida Keys to find a missing person in the twenty-first book in the thrilling Hardy Boys Adventures series