I read this "novella" as a fan of Andrew Scott's science books, including "Pirates of the Cell" and "Molecular Machinery." This roughly 3-hour read is about Scott's encounter with Aileen, a little green alien from another planet (spoiler alert.... though the book implies that she might also be from right next door, depending upon the way we interact with space and time.) As Scott works his way through the story, he teaches us about the way the universe works, the interaction of chemical particles (or waves?) with each other and energy, and even a little bit about evolution. The ending is satisfying, leaving the possibility for more novellas. That'd be neat.