November 2014
In the mission Scattered in Skyhold, I have 36 of 48 books collected, but then it bugged out and now won't let me pick them up. It's glowing but won't show me the "press X"
November 2014
December 2014
December 2014
And on PC some books are out of reach (one is floating in the thin air).
Open world map and travel to another area (any, Val Royeaux is the best as it's small so loadscreen is short), then travel back to Skyhold.
After that you should be able to pick all the books again including ones you picked before but they'll count as new picks and you'll complete the collection. Start with the book behind the throne.
December 2014
I can confirm that JoxerTM22's solution works as I did the same when I ran into the issue last night. Even after completing the quest, though, the books are still lying around everywhere and still prompting me to pick them up when I pass by.
December 2014
December 2014
I also get the problem that even after you finish this quest the books remain highlightable and lootable not that it progresses anything. Just a nuisance.