The Lost Years by Mary Higgin Clark

Mary Higgins Clark is well known for her psychological suspense and murder mysteries. In The Lost Years, she follows a page from Dan Brown's book and interweaves religious controversy with a murder mystery. When a biblical scholar discovers a parchment with a letter written by Jesus that was stolen from the Vatican years earlier, it is not clear who he can trust. When he ends up murdered, his daughter makes it her mission to find the parchment and the killer -- risking her own life to do so.