January 2006. In the Swedish hamlet of Hesjövallen, nineteen people have been massacred. The only clue is a red ribbon found at the scene. Judge Birgitta Roslin has particular reason to be shocked: Her grandparents, the Andréns, are among the victims, and Birgitta soon learns that an Andrén family in Nevada has also been murdered. She then discovers the nineteenth-century diary of an Andrén ancestor—a gang master on the American transcontinental railway—that describes brutal treatment of Chinese slave workers. The police insist that only a lunatic could have committed the Hesjövallen murders, but Birgitta is determined to uncover what she now suspects is a more complicated truth.

Why is it so hard to make lasting changes in our companies, in our communities, and in our own lives? The primary obstacle is a conflict that’s built into our brains, say Chip and Dan Heath, authors of the critically acclaimed bestseller Made to Stick. Psychologists have discovered that our minds are ruled by two different systems—the rational mind and the emotional mind—that compete for control. The rational mind wants a great beach body; the emotional mind wants that Oreo cookie. The rational mind wants to change something at work; the emotional mind loves the comfort of the existing routine. This tension can doom a change effort—but if it is overcome, change can come quickly. In Switch, the Heaths show how everyday people—employees and managers, parents and nurses—have united both minds and, as a result, achieved dramatic results.