[Zubersoft]

The "book curve" corrections aren't perfect. I'd say they are something like a 70-80% (in terms of a perfect replication of the page), while putting the glass over the book makes it more like 85-90%. You'll notice the most distortion on the part of the page that is the furthest away from the head of the scanner. I can share an example of a scanned book with the SV600 if you'd like. The PDFs I've created with this approach are not terribly optimized, so they are a little slower to load than I would like, but I didn't run them through Adobe Acrobat's optimization to properly compress the images (I may do that at some point). Clear plastic would work fine as well as long as it is heavy enough to flatten the book and hold in place and transparent enough not to reflect the light of the scanner.

Mike