Just completed this quest a few minutes ago with my 58 burg. Found a bookcase at the top of the stairs north of the hall of falling waters. Must've clicked on it 20+ times, with track treasure on & off and nothing. Killed the Globsnaga orc several times that spawned every time I clicked the book case and nothing. Did a bit of online research and found this thread. Exited the game, logged back in, clicked the bookcase & voila, got the scroll for quest completion!