Harry Widener boards the Titanic holding tight to a priceless book--and his last known words are that he must return to his cabin for his treasure. Neither the young man nor the book will ever be seen again. In his honor, his mother builds the Harry Widener Memorial Library at Harvard to memorialize her son and house his extensive book collection. ? Decades later, Violet Hutchins, a Harvard sophomore recovering from her own great loss, is working...