Many people still don't know that e-books can, in many cases, be purchased from independent bookstores. My original e-books aren't available on Google Books yet, but I do like making them available through DriveThruFiction, so it's not all just the behemoths Amazon and B&N (although DTF doesn't have thriller The Devil's Bait).
But there are plenty of e-books that can be purchased from your favorite indy (like, say, Mysterious Galaxy). And the folks at MediaBistro.com's GalleyCat have put together some info to help you find out how it works. Check it out here.