The Lady of the Lake by Andrzej Sapkowski

Trapped in a world ruled by the Elves, separated from Geralt and her destiny, Ciri will need all her training as a fighter and sorceress to survive in the fifth novel of the Witcher, Andrzej Sapkowski’s groundbreaking epic fantasy series that inspired the hit Netflix show and the blockbuster video games.

After walking through the portal in the Tower of Swallows and narrowly escaping death, Ciri finds herself in a completely different world. . . an Elven world. Time does not seem to exist and there are no obvious borders or portals to cross back into her home world. She is trapped. 

But this is the child of prophecy, and she will not be defeated. She knows she must escape to finally rejoin the Witcher and his companions—and also to conquer her worst nightmare. Leo Bonhart, the man who chased, wounded, and tortured Ciri, is still on her trail. And the world is still at war.

Witcher collections
The Last Wish
Sword of Destiny

Witcher novels
Blood of Elves
The Time of Contempt
Baptism of Fire 
The Tower of Swallows
Lady of the Lake
Season of Storms

Hussite Trilogy
The Tower of Fools
Warriors of God