Also, the file seems to be corrupted, and my book collection has not only grown, but also been pruned. So, I started afresh.
About five minutes ago, I figured I had finished one bookcase. This would be one of, um, about 7, depending on whether you count certain things as a full bookcase. But, we're talking double stacks of paperbacks, 474 cataloged, including the bulk of my already read paperbacks, so, all in all, not bad for two nights' work.
Then, I realized that I'd accidentally skipped a shelf. Oops. Probably another 200-250 books on that shelf. It's going to have to wait a bit.