Tantra and Sex books
Tantra

[2011] Slow Sex: The Art and Craft of the Female Orgasm by Nicole Daedone

SECRETS OF SEXUAL ECSTASY By DAVID AND LINDA HOWE.

Awaken Healing Energy Through Tao by Mantak Chia
Healing Love through the Tao: Cultivating Female Sexual Energy by Mantak Chia
Taoist Secrets of Love: Cultivating Male Sexual Energy by Mantak Chia and Michael Winn
The Multi-Orgasmic Couple: Sexual Secrets Every Couple Should Know by Mantak Chia, Maneewan Chia, Douglas Abrams, and Rachel Carlton Abrams
Healing Light of the Tao: Foundational Practices to Awaken Chi Energy by Mantak Chia

Sexual Secrets: The Alchemy of Ecstasy by Nik Douglas and Penny Slinger (Dec 1, 1999)
SPIRITUAL SEX: Secrets of Tantra From the Ice Age to the New Millennium by Nik Douglas

Love and Orgasm by Alexander Lowen (Oct 1, 1975)

The Function of the Orgasm by Wilhelm Reich (Jan 1, 1975)

Tantra: Yoga of Sex  (July 13, 1983) by Omar V. Garrison

Sex, Drugs & Magick: A Journey Beyond Limits by Robert Anton Wilson (Jan 1, 2004)

[1981] Masturbation Tantra and Self Love by Margo Woods