The runaway success of Netflix's Witcher adaptation appears to have had a knock-on effect on the rest of the franchise. The Witcher games recently reached record-high player counts and Andrzej Sapkoswki has been propelled to the top of Amazon's book charts.
https://www.notebookcheck.net/The-Witcher-games-Witcher-books-get-a-big-boost-after-The-Witcher-Netflix-launch.448841.0.html