One of the most distinguished experts on van Gogh and Cezanne sums up a lifetime of research and discoveries. In the art trade, research and judgment meet in a special way. Good or bad, genuine or fake--these are questions that often prove to be more urgent and to have more repercussions than in the academic field. This is especially true when it comes to the two great forerunners of modern art: van Gogh and Cezanne. Unrecognized outsiders in their lifetime, their paintings grew in the twentieth century to be the most sought after and expensive works in the entire art market. How this astonishing development came