Self-help writer Eric Newborn's motivational books have spawned a legion of devoted followers who swear that his ideas have pulled their lives from the brink. But after Eric can't save his own wife from dying, he finds himself at a loss -- the power of positive thinking is simply not enough to overcome his grief. Retreating to the home he and his wife shared on Martha's Vineyard, Eric, with his dog as his closest companion, attempts to distance himself from the teachings he has come to hate.

But when a woman named Sam shows up at his door one night five years later, Eric must finally confront his heartache and reconcile his worldview with the pain he has suffered.

At once a powerful love story, a stirring portrait of a soul laid bare by grief, and a celebration of coincidence, connection, and the belief that true love never dies, The Book of Why explores the deep powers of the heart and mind to shape the world around us, blurring the lines between loss and love, fate and free will, despair and joy.

'This is a haunting and extraordinary book.' -- Julie Orringer, author of The Invisible Bridge