Do children’s classics still hold up when read by adults? I never read the Narnia books when I was younger, but I did read The Screwtape Letters a few years ago and liked its sinister plot and epistolary storytelling. Similarly, this book’s heavy Christian undertones fall just short of eye-rolling at times, though the themes of temptation, redemption, and righteousness enhance the plot so effectively that without them the book would have been forgotten as just another kid’s adventure. A final plus is that the fantasy world feels real enough to immerse readers but not enough to overwhelm them.