Diana Richardson is considered to be one of today’s leading authorities on human sexuality. She is the best-selling author of eight books on how a person can experience a more fulfilling sex and love life, including O-Books' The Heart of Tantric Sex, which has sold over 71,000 copies to date. Diana has been teaching couples with her partner since 1993, in their informative and life changing Making Love Retreats. They are based in Heimisbach, Switzerland.