Oooh, thanks for the reply. I guess I'm not concerned so much with how closely the show follows the book, but rather that the book has the same overall tone and atmosphere and is as enjoyable as the show. And it sounds like it is! Looks like I'll be adding it to my Wish List. :)

Hmm, I just looked it up, and apparently the book was published in 1990. I had no idea it was so old! I just assumed it was something fairly recent. Where in the world have I been? Heh. (Although, considering I discovered Oz a good 10+ years after the fact, I guess this is par for the course.)