The Eternal Ones by Kirsten Miller (old cover see the new one here)
So apparently there is a silhouetted couples trend on the rise. And I can't say I really like it. Silhouettes under the right circumstances can be beautiful but I think jamming it into a bookcover with a bunch of other stuff going on doesn't really work for me. It's weird some are tiny and some are giant! Some are very vague, others almost unrealistically specific. I think Halo would have to be my favorite, I do think a less swirly typeface might have looked better though.