[BeeTee-Ess]

I have both K3 and K4NT.

They are both organised the same way.

I have a collection called __Reading (that is two underscores at the start).

Next I have a collection called ~_Assorted (that is a tilde, followed by a single underscore). It is used as a grab bag for any book not otherwise assigned to a collection.

All other collections have a tilde at the start eg: ~Austen, Jane

And the primary sort order is by title.

The result is __Reading, followed by ~_Assorted, followed by all my other collections in alphabetical order, followed by all of my books (whether in collections or not) also in alphabetical order.

I rarely need to refer to the list of books, as any book should normally be in one or more assigned collections, or ~_Assorted. Books are added to __Reading or removed as appropriate.

If I change the primary sort order to Collections, the book list which normally follows the list of collections disappears, other than those books which have not yet been assigned to collections. This makes sense to me.

At the same time, the ~_Assorted collection jumps ahead of the __Reading collection, which means that by default, tilde sorts before underscore. As I rarely do this, however, this is of little consequence to me.