An extensive book on just about every sort of optical principle imaginable, although not necessarily in the ways one might think. Not a book revealing secrets of how certain miracles were accomplished or specific props constructed. Much of it is like a scientific book explaining why optical illusions work, and how things like shading or beveling can be used in magic work. You'll find everything imaginable about Pepper's Ghost/Blue Room, tons about mirrors of all sorts and what can be done with them, even seems there was a section on the use of scrims. The Million Dollar Mystery principle is explained here. Almost more of a science/physics book than one specifically about magic. An encyclopedia on the subject of things related to visual perception, which magicians may find of use in their research. Not a how-to book, or a series of plans or instructions for building deceptive props or illusions.

One of a series of 4 books.
These books are indispensable to any serious magician.
With these books in your library you have every principle in magic at your fingertips.
Add them to your library. You won't regret it!