Here are some books which I’ve found useful, expanding or otherwise enlightening.  I hope you do too:

David Deida:

The Way of the Superior Man

Dear Lover

John Firmin & Anna Gila:

Primal Wound

Sunyata Saraswati and Bodhi Avinasha:

Jewel in the Lotus

Daniel Odier:

Tantric Quest

Valerie Brooks:

Tantric Awakening: Woman’s Initiation into the Path of Ecstacy

Barbara Carrellas:

Urban Tantra: Sacred Sex for the Twenty-first Century

Diane Richardson:

The Heart of Tantric Sex

Margo Anand:

The Art of Sexual Magic