Sorcery and Cecelia or The Enchanted Chocolate Pot told the story via letters exchanged between Cecy and Kate. In The Grad Tour the story is told by entries in Kate's (now Lady Schofield) commonplace book and Cecy's (now Mrs. James Tarleton) deposition to the Joint Representatives of the British Ministry of Magic, the War Office, and the Foreign Office. Cecy and Kate are on their honeymoon with their husbands (Cecy's James and Kate's Thomas), Lady Sylvia, and assorted servants. Of course Lady Sylvia will be staying in Paris where she makes her home. But as soon as they land in France, they are involved in mysterious events: the delivery of a strange bottle of scent, a robbery, a servant who is missing, and the news from the British representative that coronation regalia is being stolen throughout Europe and that two couples on their Grand Tour are just the ones to solve the case.

(Source: Magic Carpet Books)