Downloaded the cover from Wiki, thank you.
Not bad first try.
It has some issues that prevent it from being added to the site permanently:
- Moire effect (see those little flowers on the black areas on the front). Impossible remove well.
To prevent this scan using moire removal (also known de-screen or de-rasterisation)
- Some blurryness on lower right side of back cover.
To prevent this but something heavy and flat on top of the cover when you scan.
- Also some griddiness, probably due to the overscan.
Scan at 600DPI.
Cover also needs additional cleaning and scratch removal, screenshot replacing and text retyping.
This part I can do, but first 3 you need to do when scanning.
Hope I didn't scare you away

But thanks for the cover.