In the 1950s, two sisters named Helen and Betty Mitchell claimed to have met humanoid creatures from outer space in a St. Louis, Missouri coffee shop. We Met the Space People, written in 1959, is their account of the visitation. Judging by the book cover,

These are texts relating to the philosophy of Thelema, many of them written by the occultist Aleister Crowley who founded the organization A.'. A.'. (Argentium Astrum -- the Silver Star) as well as others by members of the OTO (Ordo Templi Orientis -- Ord