From Simon & Schuster, Sex Encyclopedia: A to Z Guide to Latest Info on Sexual Health Safety & Technique is Stefan Bechtel's guide to all things sex. The more than 120 entries in The Sex Encyclopedia, arranged in an easy-to-use A-to-Z format, provide the most up-to-the-minute information on sexual health, safety, and technique from dozens of the nation's top doctors, clinicians, researchers, and sex therapists.