Volume 6 - Part 7: [3%] that came from a far-away land. They might discuss ► It should be far away (space; which is also used later on) or faraway (no hyphen). [62%] the realtor chased me away as soon as they saw us... ► It should be us?

Have you checked toc.ncx and toc.xhtml have the same order? I've seen a few cases when they had a different order and it caused problems with some readers which use toc.ncx as a guide to order the epub pages. You can check both using any text editor.

All right, volume 3 is now updated! As usual, the updated premium version is available now while other webstores may take a couple days to process. It has also been uploaded to Amazon, but due to ongoing complications, it may not be available to download there for the foreseeable future.