Season of Storms (The Witcher #0.6) by Andrzej Sapkowski, David French

World fantasy award lifetime achievement winner, Andrzej Sapkowski, introduces Geralt of Rivia, a witcher who is one of the few capable of hunting the monsters that prey on humanity. A mutant who has the task of killing unnatural beings. He uses magical signs, potions, and the pride of every witcher -- two swords, steel and silver.
But, a contract has gone wrong, and Geralt finds himself without his trademark weapons. Now, he needs them back because sorcerers are scheming and across the world clouds are gathering.
The season of storms is coming...