The Secret of Phantom Lake
William Arden
Paperback
(Scholastic Book Services, March 15, 1973)
From their hideaway in The Jones Salvage Yard, The Three Investigators sally forth to foil the most clever villains and unravel the darkest of riddles. But now comes a riddle more than a hundred years old! Can even our formidable trio solve it? Can the stubborn trio solve a message from the dead, and find the secret of Phantom Lake? And if they do -- can they find it in time!