After the exciting adventure of 'The Crystal Navigator', this time daring Lucy Nightingale leads us into the world of Leonardo Da Vinci when one of his greatest works, the Mona Lisa, suffers a strange phenomenon that threatens to make a total mess of the famous painting. Once again Nancy Lodge, an American professor of Renaissance art, provides a wonderful story where children can immerse themselves in a fantastic adventure of discovery, magic, imagination and knowledge whilst also learning about the history of Leonardo Da Vinci and his great masterpiece.