Not really - as far as I remember, TMN was pretty much a rounded, self-contained story, aside from these occasional OOC remarks by Lewis (which I found about as annoying as his constant food descriptions).

This, boy, he meets the girl, then they start exploring haunted houses and bump into the crazy uncle (forgot his name, do not want to look up), he talks a bunch of gibberish, then they start world-travelling, bump into Charn with some Giant Queen (who cares if the becomes the White Witch later on?), then there they wreak some havoc back in London, and... well, it's pretty much this neat, intriguing mystery plot that has nothing to do with Aslan, Jesus, or Narnia, or any talking animals, up until... well, until they beam into Narnia while it's being sung into existence by Aslan.

It's from this moment on that it starts to kinda suck, and maybe it doesn't stand alone well after that moment. But I'm not sure.