Book Two of the Runespell Trilogy.
Caspar travels south into Belbidia with his companions Hal and Brid - into the heart of the New Faith, the enemy of Brid's Goddess. Trailing Vaalakan spies, they seek the Druid's Egg which alone can keep the fortress of Torra Alta safe from enemy attack.
But in the land of the Inquisition, all trace of ancient lore has been stamped out, including a sect of mute priestesses known as the Keepers. And without the lost runes they guarded, the Egg may never be found.