Just completed this quest last night. There are 4 tomes that drop randomly off of Jaelk & lararith in SS.
The 4 tomes needed:
Tome of Elemental Cognizance - Most common
Tome of Elemental Understanding - Kinda Common
Tome of Elemental Contemplation - Rare
Tome of Elemental Insight - Very rare
Give all 4 tomes to the Mosscovered Treant in PoG to get the belt.
Edited, Fri Sep 27 10:12:09 2002