Board Thread:Skyrim/@comment-12758041-20130720014612/@comment-6881629-20130720095842

It is listed on the wiki page that on PS3 the quest simply may never start. I have no idea how the Legenday edition deals with DLC i would hope its on the game disc not the hard drive, you could try a re-install then picking up and reading the book but don't get your hopes up (it may not work and you may have gone to far with out the quest).