Nonetheless, he cautioned: "They are in an early stage, so they need more work and I need to polish more details until they read the way I want. Bear in mind that the MS of the last book, A Dance With Dragons, had 1,500 pages, so I still have hundreds of pages ahead of me.
January 27, 2013 -- GRRM posted a chapter excerpt on his website: Mercy I
An Arya Stark (going by a pseudonym) POV chapter, this was posted to Martin's site and is archived online. It's also available on the World of Ice and Fire app.
August 2013 -- GRRM reads a chapter at a convention: Tyrion I
One of Tyrion Lannister's chapters was read at WorldCon of this year. It is now available on the World of Ice and Fire app.
October 2013 -- GRRM reads a chapter at a convention: Barristan I
Ser Barristan may now be dead as of Season 5, but he's alive, well, and a POV character in the books. The chapter is now currently available on the World of Ice and Fire app.
December 3, 2013 -- GRRM publishes a novella: The Princess and the Queen
Set in the world of ASOIAF, this novella tells the story of the "Dance of Dragons" -- a fictional war that took place in Westeros's past. It's a riveting action-packed read, but it's no TWOW.