Wild!

This one is wild. I've never read challenging, parallel world, first-person story concentrating purely on personal issues of a character and his familiar and not familiar world. Most parallel world stories of a similar but not nature is more about the scifi or some other mysterious protagonist. In this book, it's about a real struggle, not just of being in a different world and the only one who truly understands (or not) what's going on, but his emotions, sins, and desire to be forgiven and be returned to his real family, and to say "no" to the wild adventure he was plunged into.