Prestigious startup incubator Y Combinator has just announced that it’s adding two new partners: Paul Buchheit, who created Gmail and founded FriendFeed; and Harj Taggar, a former participant in the YC program who has been working there over the last year to help advise

Buying a digital book for your iPad is a very odd experience. If you fire up iTunes, you can find music, movies, apps, even audiobooks, but there is no category for digital books. You need to first download the iBooks app, and then buy books within that app. So it is like a marketplace within a marketplace that also happens to be a reader. The Kindle app also works that way. It is confusing.

But if you go into the App Store, you can find a whole category of iPad apps which are books. Many of