"Among the fabled tycoons of the Gilded Age -- Carnegie, Rockefeller, Vanderbilt -- is a forgotten figure: Mrs. Frank Leslie. For twenty years she ran the country's largest publishing company, Frank Leslie Publishing, which chronicled postbellum America in dozens of weeklies and monthlies. A pioneer in an all-male industry, she made a fortune and became a national celebrity and tastemaker in the process. But Miriam Leslie was also a byword for scandal:...