Can't remember the name.

[Bresdin]

When I was much younger I read a sci-fi fantasy book and the title and author completely escaped my mind.

I really want to read it again but all I can remember is that the main character gets sucked into this planet and gets shape-shifted into an animal...i think a deer? or stag? well one of the characters gets turned into a deer. They need to get to the heart of the planet to save it and themselves.
And sadly thats all I can remember. I know horrible.
But if this sounds at all familiar please let me know if you know what book im thinking about.

[Derek]

That vaguely reminds me of some Ursula Le Guin that I read when I was very young. Only vaguely, mind. I'd have to research it a little more - but it was in the Junior Fiction section of the local library (along with "R for Rocket" by Ray Bradbury).

[Marc]

Midnight at the Well of Souls, by Jack Chalker. The hero, Nathan Brazil, gets his spiritual essence transferred into the body of a stag. He has to journey to the center of the planet to activate a computer to fix reality.

[Bresdin]

YES THATS IT!! Thank you so much!!!