The ghosts in the castle

"Zaria has dreamed of England for as long as she can remember-according to the novels she's read, everything magical happens there! When her grandfather suffers a stroke, Zaria and her mother head to London to help care for him. Zaria reads fantastic tales to her grandfather every afternoon, and she's thrilled to discover that her cousin Winston shares her love of wands, wizards, and mythical creatures. But Zaria soon finds that life in London is actually quite ordinary-until she goes on a day trip to nearby Windsor Castle. There Zaria meets two extraordinary ghosts who need help finding their way back to the African continent they once called home."--Provided by publisher.