From the introduction: In the land of Thra there is science and mysticism. Mechanics was brought by the UrSeks and Skeksis and is used in understanding and manipulating the order of things. Mysticism is hearing the Song of Thra to know and alter the shape of things. Mechanics and mysticism are not opposing forces; they are often used together for the betterment of life. In the wrong hands, they can also pervert and distort life.