A great deal is happening in London and the country this season. For starters, there's the witch who tried to poison Kate at the Royal College of Wizards. There's also the man who seems to be spying on Cecelia. (Though he's not doing a very good job of it—so just what are his intentions?) And then there's Oliver. Ever since he was turned into a tree, he hasn't bothered to tell anyone where he is. Clearly, magic is a deadly and dangerous business. And the girls might be in fear for their lives . . . if only they weren't having so much fun!

Kate and Cecy and their new husbands, Thomas and James, are off on a leisurely tour of the Continent. But once they arrive in France, strange things start to happen. Cecy receives a mysterious package, Thomas' valet is assaulted, and Kate loses a glove. Soon it becomes clear that the newlyweds have stumbled upon a magical plot to take over Europe, and they must embark on a daring chase to thwart the evil conspiracy. There's likely more trouble ahead—for when you mix Kate and Cecy and magic, who knows what's going to happen next!

Ten years have passed since Kate and Cecy married Thomas and James, and England is now being transformed by the first railways. When the Duke of Wellington asks James to look into the sudden disappearance of a German railway engineer, James and Cecy's search reveals a shocking truth ... The railway lines are wreaking havoc with ancient underground magical ley lines, which could endanger the very unity of England. Meanwhile, Kate has her hands full taking care of all their children, not to mention the mysterious mute girl Drina, rescued from a kidnapper! The letters between Kate and Cecy, and between their husbands, blend magic, mystery, adventure, humor, and romance.