I still think you're confused. Making a Twilight knockoff about mummies isn't going to get you sued or indicted. The content, in fact, really doesn't matter. The point is are you deliberately trying to confuse buyers who want Twilight into buying your book instead by mistake?

That's just not a feasible attack vector with brick & mortar stores, where you can't draw eyeballs without paying for very expensive off-shelf displays. But on Amazon, you can game the search results to put up a page that looks to an uninformed buyer like the genuine product. That's fraud, or nearly so, and it's absolutely not what the me-too publishing world does.