O’ Flynn spent twelve years writing the book, during which he extensively researched world mythologies, religions, and man’s relationship with the supernatural. The book was influenced by publications such as “Man, Myth, and Magic” and writings on mythology by Joseph Campbell. It delves into questions about the existence of God, intelligent life in the universe, the purpose of life, and the power of the human mind. The composition of the book was also influenced by various other writers and their works.