@peaceridge,
I use an alternative option to keep Pocketbook uncluttered.
Open Pocketbook (but don't open a book).
Open Menu (top right next to PB icon on my tablet) and select Settings.
Set Automatic scanning to OFF
Press 'Select folders to scan' and UNCHECK everything.
Then the only books PB knows about are those I open in PB via CC (or some other way).
Even if you don't do this, PB has 3 filters 'All Books', 'Recent Read' and 'Favorites'. Doesn't the middle one put your 5-6 ongoing books at the top?
ETA: D-uh! Although the above is true, it may only work for me because I delete books from the device as soon as I've read them
