The Jubilee Problem (Paperback) (ISBN-13: 9780999119129)

The year is 1897. Sherlock Holmes and his lovely young American daughter Lucy James must foil a plot to destroy Queen Victoria's Diamond Jubilee celebration, defeating the high-ranking traitor who has eluded them in their previous adventures. If they fail, the Queen and thousands of innocent people will die, and the British Empire will fall into chaos.