""The Invention of the Third or The Master Mason's Degree"" is a book written by Albert G. Mackey, a prominent American Masonic historian and author. The book explores the origins and evolution of the Master Mason's Degree, which is the highest degree in Freemasonry. Mackey delves into the historical and symbolic significance of the degree, tracing its roots back to ancient Egyptian and Greek mystery schools. He also examines the influence of medieval...