Here are some more:

http://www.digihitch.com/amz-hitchhiking-books

http://www.librarything.com/authorcloud.php?view=larahall

http://www.waterborolibrary.org/bklista.htm (Books to brighten your mood.)

http://www.alibris.com/search/books/subject/Hitchhiking

There are more, but you get the idea. Don't you love Google?

Cathryn