In 1968 Mick Jagger couldn't understand why The Rolling Stones were broke. The man he asked for help was a German prince, a merchant banker. They forged an unlikely alliance which re-invented the business of rock 'n' roll. As a youthquake shook the Establishment, Prince Rupert Loewenstein thrived in both worlds, never relinquishing his elegance or decorum. For nearly 40 years Prince Rupert worked with the Stones as - in his own words - "a combination of bank manager, psychiatrist, and nanny," usually enthralled with his clients but often bemused and exasperated with them, too. Coolly impartial and dryly humorous, this is a refreshingly different take on the rock 'n' roll world from within its inner sanctum.