A simple act of kindness always sparks another, even in a frozen, faraway place. When Smeerensburg's new postman, Jesper, befriends toymaker Klaus, their gifts melt an age-old feud and deliver a sleigh full of holiday traditions.

Set against the backdrop of the early eighties, Cliffy retraces his extraordinary journey from famously training in gumboots among cow paddocks through the epic six-day period of the ultra marathon and his emergence as Australia's...