The cat heroes of The Book of Night with Moon are called out of our time and into the year 1874 to help prevent an assassination plot against Queen Victoria in this delightful sequel to the national fantasy bestseller. Rhiow, head of the feline team that saved New York City in the first book, returns along with her partners Urruah and Arhu, called upon to use their wizardly powers to avert disaster in Victorian England. During their trip to the past via wizardly magic, the cats meet up with a fifteen-year-old Arthur Conan Doyle, Queen Victoria herself, E.A. Wallis Budge, and various other historical figures. Their archenemy, the Lone Power, is discovered to be behind the plot. Will the cat wizards and their human counterparts discover enough details to stop him?