It doesn't seem to be any thread editing choices left here.
I just wanted to add
1. The book is kind of a travel guide with photos and links across the whole book content. Obviously this sets limit to compatible conversion formats.
2. In most threads there has not been made any distinction between azw3 format and extension. While azw3 format from Amazon has an extension azw and likely Calibrate azw3 extension can be changed to azw.