I did this as a personal illustration exercise. I was reading Madeline L'Engle's A Wrinkle In Time and found the cover and internal illustrations rather bland, so I decided to set myself a project to make a new cover for it.
This was a good opportunity to practice various things that I don't do too often - people floating, space, decorative text....
Here's a progress animation composed of various screenshots I took while I was working:
Adobe Photoshop CC 2015 on a Wacom Cintiq Companion 2. I created some pose models in Manga Studio 5 as well, to give me a starting point for the unusual positions of the figures.