When Kobie Krüger, her game-ranger husband and their three young daughters moved to one of the most isolated corners of the world - a remote ranger station in the Mahlangeni region of South Africa's vast Kruger National Park - she might have worried that she would become engulfed with loneliness and boredom. Yet, for Kobie and her family, the seventeen years spent in this spectacularly beautiful park proved to be the most magical - and occasionally the most hair-raising - of their lives.