Thats the book, really opens your eyes to the conditions they had to endure, with climate, no roads and less than suitable trucks at the time.
There is another book, which I lent to someone and lost track of who, called "To the Back and Beyond" (?), Rick will no doubt correct me on the title. It is about the mailmen in southern Australia, who were hauliers contracted to carry the mail to outlying properties and communities. Mainly prewar, the tricks they got up to to get a broken truck going again while stranded in the bush.