france set for new da vinci novel french booksellers are braced for a rush of interest after another book from the author of the da vinci code is translated into french.  angels and demons  by us author dan brown  will go on sale on wednesday. the da vinci code is set in paris - including the louvre - and has sold around one million copies in france. the main character  robert langdon  also appears in angels and demons. the da vinci code is being made into a film starring tom hanks. angels and demons was written before the da vinci code  which has sold more than 20 million copies worldwide  and been translated into more than 40 languages  since it was released in 2003. angels and demons is set mainly in rome as symbologist robert langdon follows a 400-year-old trail to try to uncover a plot by an ancient brotherhood  the illuminati  to blow up the vatican.  the novel deals with moral issues such as the debate between science and religion and also seeks to uncover some of the mysteries surrounding the pope. on his website  brown wrote:  i think the reason angels and demons is raising eyebrows right now is that it opens some vatican closets most people don t even know exist.  but i think most people understand that an organisation as old and powerful as the vatican could not possibly have risen to power without acquiring a few skeletons in their closets.  such is the success of the da vinci code in france  special tours have been organised to trace langdon s footsteps  including the the louvre museum and the saint sulpice church. the louvre has also given permission for parts of the film version to be shot in the museum. the film  to be directed by a beautiful mind s ron howard  is due to start filming at the paris museum in may and stars hanks alongside french actress audrey tautou.