My mother is trying to remember a book she read years ago.  Here is everything I know about it:

• She read it in the early 90’s, had checked it out from the library
• The premise is a man just up and leaves his job one day and ends up in Australia.  He has one close friend who knows where he is and what he’s doing. This friend is how the man accesses his finances (he seems to have been either well off, or his finances were well organized).  
• The book is of average length – not super long, not super short.  
• My mom thinks is had a brown or maroon cover. 

This is from my mom: “I think he spent some time with the indigenous.  He was a white male who got on a plane and flew to Australia.  He had one male confidant who knew his whereabouts and could access his bank account to send him money.   Maybe married but not sure.”