"A new biography of Bunny Mellon, the style icon and American aristocrat who designed the White House Rose Garden for her friend JFK and served as a living witness to 20th Century American history, operating in the high-level arenas of politics, diplomacy, art and fashion. Bunny Mellon, who died in 2014 at age 103, was press-shy during her lifetime. With the co-operation of Bunny Mellon's family, author Meryl Gordon received access to thousands...