Book of My Six Convicts

I've never seen the movie on My Six Convicts (to be honest I didn't realise one had been made), but I would really like to get a copy of the book. My grandmother had a copy which was much loved, and I haven't been able to find a copy. I live in Australia (Melbourne, Victoria), and would like to get the book, and then get the Video or DVD of the Movie.

There must be something in this type of movie/book that appeals to me, because my absolutely favourite film ever made is Shawshank Redemption.

Thanks,
Judy