Book 1 of the Witcher
 
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.
 
Andrzej Sapkowski