Sword of Destiny: Andrzej Sapkowski

Geralt the Witcher – revered and hated – holds the line against the monsters plaguing humanity in the bestselling series that inspired the hit Witcher Netflix show and video games.
Geralt of Rivia is a Witcher, a man whose magic powers and lifelong training have made him a brilliant fighter and a merciless assassin. Yet he is no ordinary killer: he hunts the vile fiends that ravage the land and attack the innocent. But not everything monstrous-looking is evil; not everything fair is good . . . and in every fairy tale there is a grain of truth.