Used by C.S. Lewis himself, the term scientifiction is revived here as it once encompassed not only what we call science fiction, but also that indeterminate field of the 1940s and 1950s sometimes referred to as science fantasy (leading up to Ray Bradbury), along with a portion of that great realm that has come, since the advent of The Lord of the Rings, to be called fantasy. Rather as an eighteenth-century novel may pre-date the divide between novel and romance, so C.S. Lewis's interplanetary novels may be considered to pre-date the modern divide between fantasy and science fiction and thus...