Book excerpt: The woman in Leonardo da Vinci's work gazes out from the canvas with a quiet serenity. But what lies behind the famous smile? Shrouded in mystery, the Mona Lisa has attracted more speculation and questioning than any other work of art ever created. This work provides an aide memoire of the world's most famous painting. The full-page colour plates portray the Mona Lisa in close-up photographs, while Serge Bramly, the author, explores its shadowy history and the fascination the painting has engendered.