[chaley]

Originally Posted by msitekkie

Thanks Chaley, I would suggest selecting a group and seeing all books rather than the group is unexpected behaviour and counter-intuitive (unlike Calibre which works as you would expect).

One reason CC behaves like this is that it shows the <<>> line, meaning that all the books in the library are in the category one way or the other. I am changing CC so that if that line is removed (there is an option in Settings / Grouping drawer to do that) then the "empties" won't be shown when a category is tapped. This change will be in the next beta.

Thanks for the long press suggestion which did give me all the manuals, although this again produced non-intuitive results as selecting a different grouping now has no effect and I can no longer see the sub-groups. I eventually realised I had to clear the search before anything else would work, but this wasn't obvious.

A long-press does a search (as you figured out). It is intended to be used like a calibre virtual library. You long press on something to restrict CC to books matching that something, then you can use any other grouping to explore further.

Any intention to bring User Categories to CC? At first glance anyway, it appears a much simpler method than using Custom Columns for what I believe should be a mainstream feature (sub-grouping) a lot of people would use.

Nope. Calibre user categories require access to calibre information that CC doesn't have.

Regarding subgroups: CC supports calibre subgroups to 2 levels. See CC FAQ Can CC support calibre's hierarchical items such as #genre?