In celebration of its 10th anniversary, a revised and updated edition of the award-winning #1 New York Times bestseller that changed the way we look at meditation, expanded with new material by Dan Harris.

After having a nationally televised panic attack on Good Morning America, Dan Harris knew he had to make some changes. A lifelong nonbeliever, he found himself on a bizarre adventure involving a disgraced pastor, a mysterious self-help guru, and a gaggle of brain scientists. Eventually, Harris realized that the source of his problems was the very thing he always thought was his greatest asset: the incessant, insatiable voice in his head.

We all have an inner narrator. It’s what has us losing our temper unnecessarily, checking our email compulsively, eating when we’re not hungry, and fixating on the past and the future at the expense of the present. Most of us assume we’re stuck with this voice—that there’s nothing we can do to rein it in—but Harris stumbled upon an effective way to do just that.

10% Happier is now considered a classic text on the power of meditation, an introduction to the practice that can convert even the most hardened skeptic. With over a million copies sold, 10% Happier is the go-to guide, and with meditation now a widely accepted and encouraged practice, Dan Harris is a pivotal and approachable figure in the field who has built a thriving platform based on the ideas he first presented in this book.

In this 10th Anniversary Edition, Harris offers a new preface reflecting on how much has changed—for him and for the public perceptions of meditation, plus a revised and expanded appendix, filled with guided meditations and practical advice for people looking to boot up a habit.