- Ways of growthHerbert Arthur Otto
- Fantasy encounter gamesHerbert Arthur Otto
- Total SexHerbert Arthur Otto, Roberta Otto
- The new sex educationHerbert Arthur Otto
- Dimensions in wholistic healingHerbert Arthur Otto, James William Knight
- Love today: a new explorationHerbert Arthur Otto
- Marriage and family enrichmentHerbert Arthur Otto
- The new sexualityHerbert Arthur Otto
- Liberated orgasmHerbert Arthur Otto
