I played around last night a bit with creating a book cover, just to have a placeholder on Leanpub until I can get a proper book cover designed.
I’ve included the images here so that people can see them (and make suggestions for improvement or totally different cover designs—this one looks too much like the “generic” product labels of the 1970s). Also, I wanted to have a URL for the tiny icon to put in my sidebar.
Ideally I’d like a design that is visually striking, and that conveys visually that the book is about electronics. It should look OK full size, but also work as a small thumbnail, since that is how Leanpub displays their books.