The Tower of Swallows. Andrzej Sapkowski

The world has fallen into war. Ciri, the child of prophecy, has vanished. Hunted by friends and foes alike, she has taken on the guise of a petty bandit and lives free for the first time in her life. But the net around her is closing. Geralt, the Witcher, has assembled a group of allies including Dandelion, Milva, Regis, and Cahir, to rescue her. Both sides of the war have sent brutal mercenaries...