Extremes along the Silk Road (John Murray Rs 435), written by an unsettlingly active Oxford don, Nick Middleton, is about adventures taken place in some of the remotest places of the planet&mdashamong sand dunes taller than the Eiffel Tower, atop hot rocks in the Gobi desert, with a mask over his face in a remote anthrax-polluted site in the Aral Sea. It&rsquos all in the name of Geography, it&rsquos because such expeditions reveal &ldquothe raw material of nature and the relationships people have developed with the physical world&rdquo.