[pssquirrel]

@Snarkophilus: I think you're right that the database is being updated a lot. I'm getting the spinning arrows more than usual, plus for some reason the alphabetization when sorting by filename has gone wonky (it seems to be using "date added" rather than "alphabetical" for some, but not all, books).

I experimented some more -- this is like a puzzle where you know you have all the pieces but you're not sure where to put them. But I think I finally figured out which snippets of code go in which MesaSQLite box. Screenshots attached. So far everything seems to be working properly. Yippee!

Thanks Simon and jackie_w for your help -- and of course, thank you Kolenka for the nice piece of code!