Yeah, not sleeping for 18 years doesn't sound fun...
As for this bug, this is something I've run into before but don't have a great solution. Short version: I think if you uninstall CC completely and then reinstall it, it should work for you again.
Longer version, with some technical detail: what's happening is that the database CC uses is complaining that's too large. For some reason, the database thinks it needs to read nearly 3 gigabytes of data about your books, and that's causing it to crash. In turn, that makes CC think there aren't any books left. I don't know exactly why it thinks your 3000 books require nearly 3 gigabytes of data, but this seems to be a known problem with the database as they list some potential solutions on their website. I know the app can store more than 3000 books as I've used it with about 5000 and have reports from others of them having more.
Anyway, after this issue, I think the database isn't getting properly deleted and recreated when it's crashing due to getting too big. Thus the database is slowly growing in size every time you re-send your books. The hope is that by deleting the app and reinstalling, the database will reset itself to correctly being much smaller again.
In the longer term, I'll try to figure out how to make the database fix this kind of problem automatically, or at least warn people of what's happening.