As promised, here are the answers to the book covers contest. Remember that I hinted that all these had something in common? Did you figure it out? If not, here's the answer: All of these book covers have been shown on my blog at one point throughout the last three years. You would have found them all by searching through my blog archives.
And with that, here's the answers for each one. I've highlighted where each section came from on the actual cover. If you'd like a closer look you can click on each picture to enlarge it.