Skywalker said:I have also read in numerous interviews and books that he has set the series at 13, 15 or 18. I don't think he knows, epecially considering it was orignally meant to be a trilogy.
I've never read anything other than 'at least three more books' from him (and I've read pretty much every real interview, chat transcript, or signing transcript that's appeared online since 1996), excepting the 'at least two more books' in the interview attached to the e-book version of the prologue to Crossroads of Twilight. The 'at least three more' seems to have been his standard answer from Fires of Heaven to Winter's Heart, though it's hard to say how anything in Crossroads of Twilight could have brought the series closer to a conclusion.