1. Will there be an electronic edition?

Yes, but we can’t predict exactly when. It’s up to the publisher. You can check this website to monitor when it becomes available:

https://rowman.com/isbn/9780810840041

2. What is the header graphic?

What appears at first glance to be brightly colored yarn threaded through a bead is actually an Oak Ridge National Labs super computer rendering of the path of sub-atomic particles from the Solar Wind as they interact with the Earth’s magnetoshere, rendering otherwise deadly radiation Mostly Harmless and allowing life as we know it to exist on this planet. Pretty cool, huh?