Cover Characteristics: Book Covers featuring Spaceships/UFOs

Technically the topic this week is UFOs, but really whether something is a UFO or not is relative, right? I mean, to the aliens in the UFO, it's actually just a spaceship. Or it could be humans flying around in a ship, or something that's not even a ship, but if someone happens to see it and doesn't know what it is, voila! It becomes a UFO. Yes? This was all just a really long way of saying I'm...
 

Cover Characteristics: Book Covers featuring Kissing

"Is this a kissing book?" Yes, child from The Princess Bride movie whose name I don't actually know, these are totally kissing books. Maybe. Actually I have no clue, but they do have kissing on the covers! The thing about book covers with kissing is, I don't have anything against them, I just don't tend to like the style of covers that feature this particular topic. Or rather, books with people...