The developers did not state why the writer sought them out.
Andrzej Sapkowski, a writer, visited the CD Projekt RED studio, which develops games based on the Geralt books' adventures. The details of his visit are just now known.
Sapkowski signed his portrait, talked with the studio staff, and looked inside the studio where CD Projekt games are being made.
CD Projekt did not state why the writer came to visit the designers; fans have long believed that the writer and the studio have a strained connection; Sapkowski himself denied this, but without much success.
Perhaps the visit is somehow linked to the development of new Witcher games. Now CD Projekt is working on two such projects: a complete new part of The Witcher and a remake of the first game in the series.
This is an interesting story.