The Mystery of the Chimeric Cornucopia — Elizabeth Arthur

When Jupiter, Pete, and Bob travel north to Jackson for a Fourth of July celebration with their new friend Branko Petrovic, Jupiter hopes to unravel a mystery concerning his long-dead mother. Instead, The Three Investigators find themselves hot on the trail of André Laurent, a French-Canadian counterfeiter and murderer who disappeared twenty-five years ago, but who may be back in town. While exploring a nearby cavern, they discover a hidden bat cave that conceals engraved plates for printing $100 bills - and a subsequent face-to-face meeting with a man who has burned off his own fingerprints puts them all in serious danger!