Winner of the 2001 Pulitzer Prize and Tony Award for Best Play

On the eve of her twenty-fifth birthday, Catherine, a troubled young woman, has spent years caring for her brilliant but unstable father, a famous mathematician. Now, following his death, she must deal with her own volatile emotions; the arrival of her estranged sister, Claire; and the attentions of Hal, a former student of her father’s who hopes to find valuable work in the 103 notebooks that her father left behind. Over the long weekend that follows, a burgeoning romance and the discovery of a mysterious notebook draw Catherine into a seemingly unsolvable problem with the highest of stakes.

"…combines elements of mystery and surprise with old-fashioned storytelling...” — NY Daily News