THE FAMILY TREE Rebecca Monroe is terrified of turning into her mother.   On the day Lady Diana married Prince Charles, Rebecca™s mother locked herself in the  bathroom of 24 Beech Drive and never came out.  Was it because the holiday dinner  didn™t turn out just right?  Because Rebecca™s grandmother married her first cousin? Or  was she simply, unalterably unhappy?  According to Rebecca™s scientist husband, our  genes control our fate, but Rebecca isn™t so sure.  Leaving everything to science allows  little room for the events that shape our lives.   Looking for clues in a family history filled with three generations of mistaken marriages,  dubiously fathered children, and hand-me-down sayings, Rebecca discovers she is just  one piece of a family history that is still unraveling”and she wonders if events of the  past are destined to repeat themselves in her own child™s future.    The intertwining relationships of mothers and daughters, sisters and brothers, and  husbands and wives go to the heart of The Family Tree as it transcends the story  of one woman and her family to become an indelible and resonant novel in which author  Carole Cadwalladr ponders what truly makes us who we are.