As a young girl, Katya Geller learned from her mother that math was the answer to everything. Now, approaching forty, she finds this wisdom tested: she has lost the love of her life, she is in the middle of a divorce, and has just found out that her mother is dying. Nothing is adding up. With humor, intelligence, and unfailing honesty, Katya traces back her life's journey: her childhood in Soviet Russia, her parents' great love, the death...