Hmm, I was fast reading and I thought he had the same thought as I did, about the Cloud Connection search. I know certain user would like to keep all books on the device, but I'm on the other side of the road and tend to search and download only the book(s) I plan to read.
1) I search for a book say with title containing "Passenger", CC returns the Level 1 structure as usual. I need to pick one of the options (all items are visible, but many of them contains nothing - I think the empty items should not be displayed) and find Books there, let's say "Passenger to Frankfurt". I tap on it and enters the Book Details.
2) Here, if I tap on a tappable item, like "Detective", CC returns the short list filtered by "Passenger".
3) If I "clear" the search (filter), CC would bring me back to the Level 1 - FULL. This is what I meant in the previous post.
This, actually I intended to ask for, but as you'd said about "massive work", I managed to live without.