 He understood they were not an alien species – and also a vital aspect of living under the system Erich Honecker used to describe, with no hint of irony, as 'actually existing Socialism'".In 2009 Millar's book "All Gone to Look for America (Riding the Iron Horse across a Continent and back)" was published, an account of a month spent criss-crossing the United States by railway.The book was described by "The Daily Telegraph" as "for those who love trains, microbrewery beer and the promise of big skies and wide open spaces.