I've tried placing the books in any order possible :|
nothing ><
I'm sorry I can't help you here. The order is marked by the candles: put any book on the pedestal marked by the same number of candles as the one where you found it. Unfortunately I don't recall that.
Leveled to 30 and I got an entire set of Aleroth

by the way, is that the set which nobody finds it's ring? :S
I gather this is the Archmage of Aleroth's set. If you need help with finding pretty much anything, there's a
map thread in the German forum. The item most often not found is the bracelet. Stone's Fortress is the most confusing, too.
I just entered Broken Valley... and I'm being friggin' cursed to death as soon as enter...
That's probably the poison covering the ground. Just stay up in the air and only land in high places. Ah, and don't enter on foot.