Sisterland
It's a testament to good writing when I enjoy a book despite not caring for its main characters. Identical twins Kate and Violet are an anxious stay-at-home-mom and a thoughtless free spirit, respectively. In addition to looking alike, they also share what they call "senses" or ESP. Married sister Kate has renounced hers, but Violet has gone pro with her gift and publicly predicts an earthquake will hit St. Louis (where they live).