Though reviled for more than a century as Wall Street's greatest  villain, Jay Gould was in fact its most original creative genius. Gould  was the robber baron's robber baron, the most astute financial and  business strategist of his time and also the most widely hated. In Dark Genius of Wall Street,  acclaimed biographer Edward J. Renehan, Jr., combines lively anecdotes  with the rich social tapestry of the Gilded Age to paint the portrait of  the most talented financial buccaneer of his generation-- and one of  the inventors of modern business.