I just finished this book, the third in C.S. Lewis' Space Trilogy and, although it was incredibly complex, it was also incredibly cinematic. The villainous organization at odds with the unassuming heroes of the book was called the National Institute for Coordinated Experiments (or N.I.C.E) and a more sinister set of evildoers would be hard to find! I reproduced their symbol (a man clutching a thunderbolt) and a likely logo fitting their way of thinking.
The N.I.C.E's cold, calculating take over of England, their amoral approach to science gone mad, and at the last their aid of the worst of mankind's supernatural enemies (C.S. Lewis' stories are usually unabashedly Christian) made them a true foe to be reckoned with, the worst kind which topples kingdoms with smiles and kills hundreds with suggestion.
I hear that Out of the Silent Planet, the first in the trilogy, is really being made as a movie soon. If that's the case I hope the series is given it's due, and some day a real poster will take the place of my mockup. Certainly the themes addressed in these tales are no less relevant today then in Lewis' time.
You might notice I make a fair bit of movie posters nowadays and few drawings or stories. Hopefully I'll get back on track soon, but I've been suffering from writers and artists' block. Maybe after a long rest I'll be back to speed, but in the meanwhile I hope you enjoy these glimpses of what might be.