3 links
Original Tantra
originaltantra.com
Barry Long's books on essential principles of sexual love between man and woman. Author and purchase details.
Secret Garden Publishing
secretgardenpublishing.com
Instructional books and videos on sensuality, sexuality, and intimacy. Includes ordering instructions.
Vamacara Tantra
kamakala.com
Introduction to this style of tantra, along with excerpts and ordering information. Also details of other books by Kamakala.