It's not really affiliated with YC; I just happen to work there.

I met Ted while trying to find a copy of the book and when he told me he had a bunch in storage, I volunteered to help sell the rest. 100% sales go to him.

This edition is just a reprint of his first edition. Ted re-published it himself.

I haven't read the Microsoft edition yet but I know Ted hates what they did with his book.