Stravaganza is a series of novels written by children's author Mary Hoffman. The books are set alternatively between Islington, an area of London, England, and various cities in Talia, an alternate version of Renaissance Italy. The series originally consisted of a trilogy of books: City of Masks, City of Stars, and City of Flowers. The popularity of the trilogy allowed the series to be extended for three more books: City of Secrets, City of Ships, and City of Swords. Source: Wikipedia (en)