Posting here as my comments are the same.
I too learned about the books from Watch It Played and I too am disappointed to see that I cannot get the 2nd book as an ebook. I just finished the first book yesterday and cannot wait for the next one, and while I generally prefer hard copy books to ebooks, the ability to just jump to linked pages in the ebook was a feature I think I will miss with a hard copy. (and my girlfriend likes seeing me finally use the kindle she got me....)
So right now I guess I will try to hold out and see if the ebook becomes available again, and when it does snatch up book 3 at the same time too while I am at it.