I know it is hard to believe. Andrzej Sapkowski for whom doesn't know who he is, he is the writer of The Witcher that is one of the most famous book series in the world. Since last autumn there were frictions between Andrzej and CD Projekt RED, a Polish company that produced THE WITCHER game saga and that since few months was affirming that Andrzej popularity was increased because the game and because the collaboration with them.
Of course Andrzej didn't accepted the affirmations and said that for sure people bought the game only because they read the books first.
CD Projekt RED didn't reply to Andrzej affirmations but an answer came through Dmitry Glukhovski, writer of Metro (other book series used to create the game Metro), that attacked Andrzej saying that he is an arrogant son of a ..... and that he should only be happy to have received notoriety because the game saga.
By the way after this bad atmosphere on going since months Andrzej sold his copyright to CD Projekt RED for the symbolic amount of 9500 dollars.
img source: http://www.nastorix.it/the-witcher-3-sesso-briscola-streghe/
info source: http://multiplayer.it/notizie/183942-the-witcher-3-wild-hunt-andrzej-sapkowski-ha-ceduto-i-diritti-di-the-witcher-a-cd-projekt-red-per-appena-9500-dollari.html