User blog comment:Jimeee/Skyrim 1.9 beta update adds Legendary difficulty and raises level cap (Updated Apr 8th)/@comment-86.183.199.53-20130408141604/@comment-3186821-20130408154736

Indeed. Fetch me that book hasn't changed for existing characters, and also not Gallus' Journal or the flute. The potion of esbern and the creation of imperial light armor, and upgrading of the Nord Hero Bow are also fixed for existing characters.