Looks very clean, well done!
Few questions / comments
- assuming the symbol in the bottom centre is the Connect (Wireless, Content, Cloud) button?
- does it support full dark mode?
- noticed dropped the quick select A..Z down the side (probably a good idea)
- is there space for the "read" checkbox
- assuming the Filter / Sort buttons have the same options. If you sort by Author does that become the bigger font at the top?
Sorry not really feedback, except to say looks great, but the devil will probably be in the details of the options / sub-menus.
I agree the one "killer" feature for me would be to easily find any of the books in a Shelf / Tag / Category that are not on my device / not read and download (not matter what network I am on). A "one-touch" download of all the missing books would be ... amazing.
I prefer to pull from CC (especially when travelling), but have had to learn to be more organised as the login to content server "OK" button is always greyed out in V2.0, so getting better as push from Calibre (and it's better than I though!
