Considered to be one of the most important and fascinating books in the history of music is a discovery which brings to the world of Chopin lovers, educators, and musicologists a rare view of the late composer's thinking. This was first discovered by Mr. Janis in 1967 at the Chateau de Thoiry in France, and then again in 1973 at Yale University. At that time, the New York Times declared it to be "the most dramatic musical discovery of our age."