Back in 1969, when Morocco's ancient capital was a hashish-clouded hippie mecca, Crosby, Stills and Nash recorded their (hopelessly inaccurate) foot-tapping anthem 'Marrakesh Express'. A generation on, award-winning journalist, author, and one-time glam rock fan Peter Millar uses what is now the country's best visited tourist destination as the embarkation point for a literally reverse-engineered train journey through this still exotic, diverse, and challenging North African country, struggling to maintain its unique blend of tradition and tolerance in the turbulent winds of the Arab Spring.