
to what BetterRed said.
This is
not 
a stupid question. Questions about "How do I achieve this goal" are rarely stupid.
Just a thought... if you are using searches to find particular sets of books, the searchbar remembers its history, you can arrow up and down to quickly get at the last search.
I use this all the time.
As for pre-selecting the last book you highlighted, there is no way I am afraid.
And as you discovered, you can create Virtual Libraries out of those searches if you use them often