Personally I think there would be better ones...maybe someone else has another opinion though, which particular book were you thinking of? Anything involving quests or something like that would be good...so perhaps you could use something from one of the harry potter books, though it would be a more difficult choice than some others.
I can only think of stories such as "The Neverending Story" (1979 Michael Ende)
I've only seen the movie so I don't know what the book is like to read...the Wizard of Oz or maybe something from the The Chronicles of Narnia by CS Lewis...though they may be too cliche and I don't know how relevant they would be. What exactly do you have to focus on within the physical journey? I didn't study this as part of the HSC in 2003...though maybe someone with more insight can suggest a good book for you to do. I take it you've decided against the Fellowship of the Ring?