Ever had one of those days when you just wanted to pack it all in? Sell everything you own and go off into the unknown? Off the beaten track and into the wilderness somewhere, or out into that desert that's in the back of the mind of so many city-siders who've never actually seen it. It's romantic, but the reality can be very different. Matt Levinson was joined by by an American author who's written about an ill-fated expedition into the wild.