Search only books instead of sitewide

I was trying to figure out if this was possible, but I didn't find a way to do so. Is there a way to search only Fakku Books instead of manga on the entire site? If not, could such a feature be implemented?

If you go to your account and click the books tab you'll see what books are available on Fakku as well as what you own and don't own as of yet.

There's also a books tab at the top that shows all the books and their chapters as a whole.

Hmm I think it would be nice to have this. For example, what if I wanted to find a book with a lot of ahegao content or maybe the group tag. There's no way (as far as I know) to figure out which books are good for that. Same with sub content, but sub content will be the majority after unlicensed works are removed.