The Desert Express from Windhoek in Namibia. The stupendous Chinese feat of civil engineering that pushed a railway across the permafrost to Lhasa in Tibet. The scenic Coast Starlight train from Seattle to LA, and a stupendous 2,000-mile trip across India, from Gujarat’s parched salt flats to the lush semi-tropics of Assam. Following the success of Aurum’s Last Call for the Dining Car. The Telegraph’s deputy travel editor Michael Kerr has compiled a hugely engrossing second volume of armchair travel on trains around the world.