C.S. Lewis's Ransom Trilogy, better known as "the Space Trilogy", is a much-neglected and yet critically important part of Lewis' works. It has captivated and bewildered readers since its publication, and though hundreds of books about Lewis have been written, few seek to navigate the maze that is Lewis's "space-travel story." These books are a distillation in novel form of one of Lewis' favorite subjects, a subject whose melody is woven into almost everything that Lewis ever wrote: the medieval model of the cosmos.

Deeper Heaven is a guide and companion through the magical web of medieval cosmology, ancient myth, and critique of modern philosophies that makes up the oft-maligned "Space Trilogy." A student and teacher of literature and history herself, Christiana Hale will walk you through the Trilogy one step at a time, with eyes fixed where Lewis himself fixed his: on Deep Heaven and beyond. In the process, many questions will be answered: What does Christ have to do with Jupiter? Why does Lewis care so much about the medieval conception of the heavens? Why should we? And, perhaps the most puzzling question of all: why is Merlin in That Hideous Strength?