If you liked Touching Spirit Bear, you may like...

House of the scorpion, Nancy Farmer
Last book in the universe, Rod Philbrook
Cruise control, Terry Trueman
Man who outgrew his prison cell, Joe Loya
Between a Rock and a Hard Place by Alden R. Carter
The Island Keeper by NF Mazer
Wild Timothy by Blackwood
How I Live Now by Rosoff

& various books by Will Hobbs and Gary Paulsen.