Gilda Joyce: The Ghost Sonata is the third book involving the young American psychic investigator, Gilda Joyce.
The book was released in August 2007, by Dutton Children's Books.
Wendy Choy, Gilda's best friend, gets to go to Oxford, England for a piano competition. When Gilda finds this out, she embarks on the trip with Wendy as an official page turner. But when Gilda thinks that there are ghosts haunting Oxford, she gets excited. Mysterious Tarot cards are placed in the guests' bedrooms which gives Gilda even more reason to believe that there are hauntings in Oxford. Gilda is a self-proclaimed psychic investigator who believes that she can speak with her late father. She tries to solve the problem why this ghost is haunting them.