I uploaded my folder for covers on imgur for this post, if someone wants to see it or use it for reference and ideas.
(Yes, the first ones are animated gifs. They are experiments with the digital format ) They are not necessarily books I’ve read or that I suggest, this is just a design thing.
The covers I picked are nice for various reasons, either typography, colors, composition or ideas. Some just work nicely in thumbnail size. They are the ones I browse for brainstorming. You can click the link or browse below: