Yes, wardrobe. I was goofing off, actually. I read the Narnia books and the LotR books through at least once a year (and I've read the first 4 Harry Potter books through 7 times, starting #8 to coincide with the next book's release. I sponsor a kid's Harry Potter/Redemption league at a local hobby shop, and it helps to be knowledgeable about the topic).

Focus on the Family's Radio Theater, and the BBC, both have independent audio versions of the books available. I'm not sure about the BBC versions, but the FotF Radio Theater ones are available through mail order and some religious book stores.