Baptism of Fire (The Witcher, 3)

But now that dark times have fallen upon the world, Geralt is helpless until he has recovered from his injuries.

While war rages across all of the lands, the future of magic is under threat and those sorcerers who survive are determined to protect it. It's an impossible situation in which to find one girl - Ciri, the heiress to the throne of Cintra, has vanished - until a rumor places her in the Niflgaard court, preparing to marry the Emperor.

Injured or not, Geralt has a rescue mission on his hands.

This is the third of the Witcher novels by Andrzej Sapkowski.