Suggestion: Separate Book Chapters

I think the site would be improved if there was a way to separate book chapters in searches. When I go through a specific artist's stuff and they've released a book I haven't purchased there's about a page and a half's worth of search results I have to scroll past and it's a bit annoying. If the book chapters could be put in a separate tab or something to that effect it would alleviate this problem.

Adding the subscription tag to the search should help.

Note that choosing the author's name from the suggestions seems take you to the author's page even if you add additional search terms, though (as I just found out doing some testing for my suggestion), so you'll need to enter the name yourself without using the suggestions as help.

Artist name subscription -book -doujin
This should only leave subs and free in