With a foreword by Paul McCartney'It's semi-devotional -- a really special place' Florence Welch'There are certain things that are mythical. Abbey Road is mythical' Nile RodgersMany people will recognise the famous zebra crossing. Some visitors may have graffitied their name on its hallowed outer walls. Others might even have managed to penetrate the iron gates. But what draws in these thousands of fans here, year after year? What is it that really happens behind the doors of