Valuable electronic parts containing platinum are being stolen from shipments made by Stanwide Mining Equipment Company's cargo planes, and Frank and Joe Hardy are called upon to assist their world-renowned detective father solve the baffling case. At Stanwide the boys pose as employees, and become suspicious of their boss's hostility toward them. Is he involved in the racket? And what is the truth behind the plane crash at sea in which Clint Hill, chief pilot for Stanwide, was killed? Frank and Joe launch an aerial search for clues to the platinum thieves' hideout, believing that they will also uncover the mystery behind Hill's accident.
Frank and Joe Hardy receive an unusual assignment from their detective father. They are to "break into" the house of a Bayport neighbor, Malcolm Wright, and retrieve a top secret invention that the scientist had hidden in his study before leaving for California. The invention is in danger of being stolen, and the boys race against time to beat the thieves at thier own game.
The Tower Treasure is the first volume in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. The book ranks 55th on Publishers Weekly's All-Time Bestselling Children's Book List for the United States, with 2,209,774 copies sold as of 2001. Grownups will remember Frank and Joe Hardy and their ability to solve even the most baffling of mysteries. The first book was published in 1927, and over the years the series has sold over 50 million copies.
Fenton Hardy, the famous private detective and father of the Hardy Boys, asks his sons to help him with his latest case involving a criminal named Snattman and the illegal drug trade smuggling of stolen drugs. Hardy directs Frank and Joe to a house on the cliff, whose location overlooking Barmet Bay offers an excellent vantage point to watch for smugglers. The Hardys are tricked into the house by cries for help, and are trapped for a short time in the attic; meanwhile, their telescope and motorcycles are damaged, possibly by the smugglers. On the way home, they observe a man boating on Barmet Bay being chased by another motorboat.
Determined to learn the secret of the old mill, Frank and Joe employ a clever use to gain entrance and become trapped. There they unravel two mysteries, one involving a counterfeiting case and the other, a national security case their father is working on.
