C.S. Lewis' Space Trilogy
No doubt one of the hidden gems of science fiction by the prolific author who brought us the Chronicles of Narnia. The Space Trilogy follows the adventures of Dr. Ransom as he explores the different planets of our solar system and their various perils.
The concept for these book covers centered around the simple uniting idea of space. These books needed to feel like a consistent group but each book also stand on its own. The dust jackets feature a simple abstract illustrations of constellations surrounding the different planets featured in each book. The inner cover illustration is a much more literal space scene with each one slightly different from the other two.