A Gathering of Promises is a history of acid rock and psychedelic music in and from the state of Texas, focusing largely on its mid-1960s origins with the 13th Floor Elevators and contemporaries such as the Golden Dawn, the Red Crayola and Bubble Puppy, and following its development to the present day and the popularity of the annual Austin Psych Fest. Grounded in a strong social, cultural and historical context, the book asks how Texas produced some of the most extreme and influential psych of any era despite a prevailing social ethos of Christian conservatism and the strictest drug laws of any American state. It looks at how this environment shaped and affected the music, alongside the Texan frontier spirit and its championing of expansion, freedom and individualism.