(from the back of the book)
The Bell of Ibyn Never Tolled.
And so the covenant fell. The wondrous Bell warned the wizards of all dangers, or so the magi of Calebais thought. But fifty long years ago, some malignant force destroyed their beautiful fortress, and its opulent halls have remained untouched ever since. Until now. Into your hands has fallen a document that hints at how to pierce the protective Veil of Riddles and you have an opportunity denied to all wizards before you: to explore the covenant of Calebais, to solve its mysteries, and to loot its treasures. But how did Calebais fall, and does the danger lurk there still?