Because of the masterful retcon it does to the Narnia-verse adding much more depth,complexity and making very grand implications it's honestly (almost) my favourite Narnia book. It's a very easy,pleasant and fun read that has all major characters that appear develop and play an important part. Maybe I'm partial,because I really like Jadis' character in this book and what Lewis did with her in it. Overall,it's really tied with Voyage of the Dawn Treader for my favourite since the concluding arc of that book was just amazing and touched me on a rather deep level,even though I read it when I wasn't that young. But then again the part in Charn in MN was also very well-written.
