Bidding an emotional farewell to Dr. Marvello's Travelling Circus, Quaint leaves for Egypt with only clairvoyant fortune-teller Madame Destine by his side. Once in the land of the pyramids they must do battle with desert thieves, unearth long-buried secrets, and attempt to foil the villainous Hades Consortium's plans to poison the River Nile. With a whole new cast of characters this is a ripping Victorian adventure story featuring Cornelius Quaint—part Sherlock Holmes, part Indiana Jones, part Harry Houdini. The Times called The Equivoque Principle a "boisterous comedy" with "hairpin plot twists" and its sequel follows in the grand tradition of Victorian serials.