The A Song of Ice and Fire books currently end at when Jon is killed (if I'm not wrong - and I don't know if new ones came out). But the Game of Thrones TV-show supercedes the books.
So is the script for the show (everything after Jon is killed) written by just Benioff and Weiss or is GRR Martin (author of the books that inspired the show) involved in the script writing and the way the show shapes?
Specifically season 8 - is GRRM also involved in writing the show script with D&D?