In this action-packed series, nine-year old secret agent Jack Stalwart travels the globe in search of his missing older brother Max while solving international crimes for the Global Protection Force. In The Caper of the Crown Jewels, Jack is summoned to solve a matter of grave national importance: the theft of the Crown Jewels of the British Empire from the Tower of London. Arriving on the scene, he is greeted by a traditional Tower guards, a Yeoman Warder, or Beefeater, who explains what's missing: The Imperial State Crown, the Sovereign's Orb, and the Sovereign's Scepter with the cross containing the finest-cut diamond in the world, the diamond of the Culliinan I, the Star of Africa. The queen is not pleased. Jack identifies Ivan the Incredible and his assistant Jazz as the thieves immediately--but puzzling out how they did it is stickier. The infamous Tower has the most advanced security in the world, and even using his impressive gadgets (the Encryption notebook, his Heli-Spacer, Rock Corer, and Rope Tornado) Jack is flummoxed by how jewels were spirited out. But Jack can conjure up more than gadgets--he foils the evil magicians with some powerful mojo of his own, dispels an invisibility enchantment, narrowly avoids the executioners block and some other murderous ploys before restoring the jewels to the crown and earning the gratitude of the Queen herself!