premise: The Winds of Winter book six in a series of novels.
hypothesis: Falling Kingdoms . Falling Kingdoms ( 2012 , Penguin , ISBN 9780141346168 ) is the first novel of the series . The Winds of Winter is the forthcoming sixth novel in the epic fantasy series A Song of Ice and Fire by George R. R. Martin . `` The Winds of Winter '' is the tenth and final episode of the sixth season of HBO 's fantasy television series Game of Thrones , and the sixtieth overall .