Here's my cover art for Uncle Silas: Genetis.
After several uninspiring sketches where the action was too far away to be of any good, I finally came to the idea of having one of the kids stepping forward toward the viewer- better connection with the reader, and we get to see some sweat beads! Also uses the trick of placing us firmly in the forest growth as well- you can almost feel the leaves and plants brushing against you, the soft earth beneath your feet, smell the dank wood and foliage and feel the humidity... (well, hopefully!)
The title design is being taken care of by Dark Horse, and they're going by my idea here, which was modeled after their initial concept (bit of to-ing and fro-ing of ideas is always good). Hopefully they make my scribble look better than what you see here!
Now, THIS image would make a great postcard and poster....