The Davinci Code is the second book by Brown in wich Robert Langdon is the main character. This book describes the attempts of Robert Langdon, Professor of Religous Symbology at Harvard University, to solve the murder of renowned curator Jacques Saunière of the Louvre Museum in Paris.
In this book are many anagrams and number puzzles.This book tell us also something about the Priory of Sion and Opus Dei, a Roman Catholic organization.