The Invisible FortressPaperback, 16 February 2012

Thorgal runs afoul of a local tribe. When an old woman offers him a chance to escape the hostile villagers, he accepts. But there's more to the bargain: she says that if he can find the Invisible Fortress, he'll be able to erase his name from the Stone of the Gods, cancelling his destiny and giving him the chance of a normal life.