The romance between F. Scott Fitzgerald and Zelda Sayre has been celebrated as one of the greatest of the 20th century. From the beginning, their relationship was a tumultuous one, in which the couple's excesses were as widely known as their passion for each other. Despite their love, both Scott and Zelda engaged in flirtations that threatened to tear the couple apart. But none had a more profound impact on the two--and on Scott's writing--as the...