THE QUEEN OF TUESDAY begins with a daring conceit --- that the author’s grandfather may have had an affair with Lucille Ball. The most powerful woman in the history of Hollywood was part of America’s first high-profile interracial marriage. She owned more movie sets than did any movie studio. She more or less single-handedly created the modern TV business. And yet Lucille’s off-camera life was in disarray. While acting out a happy marriage for millions, she suffered in private. Her partner couldn’t stay faithful. She struggled to balance her fame with the demands of being a mother, a creative genius, an entrepreneur and, most of all, a symbol.