Brotherhood Of The Screaming Abyss: My Life With Terence Mckenna, Is An Autobiographical Account Of Renowned Ethnobotanist Dennis Mckenna's Childhood, His Relationship With His Brother, And The Author&8217;s Experiences With And Reflections On Psychedelics, Philosophy, And Scientific Innovation.chronicling The Mckenna Brothers&8217; Childhood In Western Colorado During The 1950s And 1960s, Dennis Writes Of His Adolescent Adventures Including His First Encounters With Alcohol And Drugs (many Of Which Were Facilitated By Terence), And The People And Ideas That Shaped Them Both. Brotherhood Of The Screaming Abyss Weaves Personal Narrative Through Philosophical Ideas And Tales Of Psychedelic Experimentation.&160;in This Book, Dennis Describes These Inquiries With The Wisdom Of Perspective. In His Account Of What Has Become Known As The Experiment At La Chorrera - Which Terence Documented In His Own 1989 Book, True Hallucinations &8212; Dennis Describes How He Had Visions Of Merging Mushroom And Human Dna, The Brothers&8217; Predictions For The Future, And Their Evolving Ideas About Society And Consciousness.