Eric Lewis is one of the great minds in magic who came up with many great effects during his lifetime.  These 3 books represent the documentation of his inventions and incorporate many of his earlier writings which have been edited and rewritten and new illustrations drawn.  These books incorporate much of the history behind the tricks which makes for interesting reading. This was conceived as trilogy and that was what was delivered, exactly 3 volumes.  Lewis was also an expert craftsman and began building tricks at a young age.  Many of Lewis' effects have also been commercially produced including many by Milson Worth.