While Joseph P. Kennedy relentlessly groomed Joe junior, his sterling firstborn, for the White House, his frail and "sloppy" second son, Jack, learned to draw on the best of his father's love and—with some brief help from a psychologist—shield himself from the control that went with it. That struggle may have been the making of the future president. Mining the hundreds of Kennedy-family letters that have just become public, CARI BEAUCHAMP reveals the complicated dynamic between the young J.F.K., his formidable brother, and their tycoon father as it played itself out in the arenas of women, politics, and World War II