Sorry if this doesn't belong in here - please move if necessary. All you'll need to start on this is a blank image of book cover proportions. This will serve as your background and can be any colour you please. Then go here: https://pixlr.com/ - click the two 'down' arrows and launch the Pixlr Express app. Then it's just a case of playing around. You can add layers, borders, text, and all manner of effects. My last three designs in the cover thread were created using this. Thought it might useful for the e-bookers among you.