Let us filter out fiction easily from ebooks sales sites

SineNomine

Please give us a single facet by means of which we can immediately filter out all genres of fiction from ebooks.faithlife.com and general.ebooks.faithlife.com.

Unknown

Searching through the huge list of books is getting more and more difficult. There are a lot of filters, but even those are becoming a long list.

Can you maybe group filters, so we can check a short list of corresponding filters. Like group fiction has: poetry, stories etc. 

And add a 'not' in each filter, so we can check to exclude something easily