Richard Rudgley Related books Essential Substances: A Cultural History of Intoxicants in Society Kodansha Amer Inc • 1994 Essential Substances: A Cultural History of Intoxicants in Society Kodansha Amer Inc • 1995 Secrets of the Stone Age: A Prehistoric Journey Trafalgar Square • 2000 The Encyclopaedia of Psychoactive Substances St Martins Pr • 1999 The Encyclopedia of Psychoactive Substances St Martins Pr • 2000