I woke up from a nap and found that no one had bought my books all afternoon. OMG! No one loves me! No one is buying my books!
Well... turns out no one is buying ANY books. Amazon had some sort of server failure (maybe they were hacked, maybe they're instituting a new system, maybe something else), and all books were apparently offline. Looked like the forums might have been offline too. The books still seem to be unavailable. This is, of course, the problem with relying on one sales outlet-- if it's down, you don't sell books. But I trust Amazon to get it fixed a lot faster than a certain small press I've worked with in the past. Big companies can at least be counted on to get up and running again as fast as possible.