Sex=The Unknown Quantity

Originally published in 1916, "Sex=The Unknown Quantity" by Ali Nomad is, as described by its author, 'a new and startling interpretation of the meaning, scope and function of sex as seen and interpreted from the inner or cosmic standpoint. A work that should revolutionize the thought of today in its relation to the vital mystery of sex in all its aspects. It presents a practical solution to the sex problems of everyday life.'

Ali Nomad was a pseudonym of Alexander J. McIvor-Tyndall, a British hypnotist, showman and speaker.