The Map of All Things (Terra Incognita Series #2)

After terrible atrocities by both sides, the religious war between Tierra and Uraba has spread and intensified, irreparably dividing the known world. What started as a series of skirmishes has erupted into a full-blown crusade.

Now that the Uraban leader, Soldan-Shah Omra, has captured the ruined city of Ishalem, his construction teams discover a priceless ancient map in an underground vault - a map that can guide brave explorers to the mysterious Key to Creation.