CS Lewis, the master Christian apologist, was also a fabulous storyteller, as well as a sort of Classical scholar. This book is a synthesis of his theology, his love for the classics, and his storytelling ability. It is a reworking of the Psyche/Cupid myth, spun by Lewis in such a way as to teach important moral values--values which Lewis propagated in his Christian writings, but which he proves (in this book) to be important to all cultures. One of the most compelling things about this novel is that it is set in a 'barbarian' society, with many gods comparable to those of the Greeks. Even in the midst of this foreign religion, however, Lewis manages to teach his Christian moral values with surprising success.
In a nutshell, this is a story about too much love. Orual, Psyche's sister, loves Psyche more than anything. Her love, however, is a selfish love, and Orual ends up destroying her sister because of that love. The central message of this book (to me, at least) is that people often treat their love protectively, and that jealousy often prompts people to hurt the one they love in an effort to keep the beloved all to themselves. The result, in this story and in others, is that someone (like Orual) who claims to love another person (like Psyche) ends up being the person in the world who hurts them the most. This culminates, in the novel, with Orual using Psyche's love for her as blackmail to get Psyche to destroy her life with the god Cupid.
Readers familiar with Lewis's 'The Screwtape Letters' and 'The Great Divorce' will recognize this familiar theme of love gone too far. As always, Lewis provides insights in this book that are both profitable and that hit close to home for many of us. This is a great work of fiction by CS Lewis, both for its theological content and for the narrative itself. I couldn't put it down until I'd finished it, and both enjoyed and profited from the reading.