The Witcher Series By Andrzej Sapkowski.
Geralt is a witcher, a man whose magic powers, enhanced by long training and a mysterious elixir, have made him a brilliant fighter and a merciless assassin. Yet he is no ordinary murderer: his targets are the multifarious monsters and vile fiends that ravage the land and attack the innocent. This is a collection of short stories, following the adventures of the hit collection THE LAST WISH. Join Geralt as he battles monsters, demons and prejudices alike...
For over a century, humans, dwarves, gnomes, and elves have lived together in relative peace. But times have changed, the uneasy peace is over, and now the races are fighting once again. The only good elf, it seems, is a dead elf. Geralt of Rivia, the cunning assassin known as The Witcher, has been waiting for the birth of a prophesied child. This child has the power to change the world - for good, or for evil. As the threat of war hangs over the land and the child is hunted for her extraordinary powers, it will become Geralt's responsibility to protect them all - and the Witcher never accepts defeat. The Witcher returns in this sequel to The Last Wish, as the inhabitants of his world become embroiled in a state of total war.