This is one of Tyson's older but, nonetheless, better books. Inside, we learn the theory behind the practice of using magic(k) mirrors for scrying, as well as for evocation (users of Runyon's method of evocation to visible appearance can find within an excellent mirror for the Triangle of Art). Additionally, Tyson walks us, step-by-step, through the mirror's construction process, beginning with the manufacture of the frame and mirror itself, the fluid condenser, to assembly and charging/consecration. It's a short book (136 pages), but each page is filled with info valuable to the practicing magician. The step-by-step instructions are quite easy, and I'm no carpenter. Regardless, if you're timid at attempting to craft it yourself, they can always be forwarded to a competent craftsman, who can prepare the parts for you to ultimately assemble.