Martin has penned a lengthy blog asking fans to no longer email him with criticism of his work. Buried within that post is the revelation that he's working on three shows for HBO and Cinemax, reported Digital Spy.
It was already known that the author was working on a sci-fi pilot called "Captain Cosmos" for HBO, but the other projects were unknown to the public.
The news of these projects comes as Martin attempts to finish the next "Song of Ice and Fire" book "The Winds of Winter" before "Game of Thrones' returns to HBO next spring.
"I am wrestling with the Son of Kong (that is, working on The Winds of Winter), trying to wrap up a final round of edits and revisions on the 23rd Wild Cards book (High Stakes), developing three new series concepts for HBO and Cinemax, hiring writers and directors for three short low-budget films I am hoping to produce based on some classic SF short stories (more on that in the months to come), making my way through the Hugo Packet to prepare to vote, looking forward to opening Jurassic World at the Cocteay and to hosting a ten-author special event for the release of Steve Stirling's new 'Emberverse' anthology, The Change.