As an aside, I've recently been playing with a CZUR (https://www.czur.com/) ET16 book scanner and I'm reasonably impressed. It is not as nice as a high quality book scanner, but it has the advantage of being cheap and actually obtainable. And it produces decent scans.

The OCR is not too bad, but one of the things I'm going to do once I pop a few other projects off the stack is to see about using tesseract (and possibly custom training for it) on the generated raw TIFF files.