Author Cherie Reich has published her three Gravity books in one comprehensive volume. It's called (appropriately) "Gravity: The Complete Trilogy" and here's the cover for it:
The picture was created by Angela Harburn. Cherie purchased the rights to use it for her cover art from Dreamstime.com. Aubrie Dionne designed the cover (the fonts and such), and Cherie drew the bookworm on the back of the cover for her Surrounded by Books Publishing logo.
Now...why I like it. If you take into consideration the placement of the spine, then the front of the ship makes a line (arrow) that points right to the title. So you can't miss the name. Additionally the reflection of the ship on the planet below frames it in so that your eye is draw to the center of the picture. When viewed as a whole, the images on the front cover condense to the words on the back, inevitably leading you to read the blurb.
That's just great marketing.
I'm very happy to judge this book by its cover. In a word: excellence.
Have a great Wednesday.