A Targaryen 'Game of Thrones' Prequel Is in the Works 'Game of Thrones' author br George R.R. Martin is writing br the script for the program's pilot. According to multiple outlets, it is close to receiving a TV order. The show will be an adaptation of Martin's book, 'Fire & Blood.' 'Fire and Blood' mainly focuses on the Targaryen family and how br they came to rule. Its setting will be 300 years before everything that transpired br on the show. That places it after the other planned spin-off that br HBO is working on. The show, which does not yet have an official title, is currently br in production.