"Self-help advice you haven't heard before . . . become more clever, more relaxed, more satisfied--and more realistic about how long it will take to make new habits stick."

– Oprah.com

"One of six books to build a dream on—pick for the year’s best guides."

– Wall St. Journal

"Norcross is the Billy Beane of personal-change gurus, using reams of psychological studies the way a sabermetrician uses baseball statistics. He'll be the first to tell you that this scientific approach beats magical thinking."

– Atlanta Journal-Constitution

"Dr. Norcross has revolutionized the psychology of change and now offers a remarkable five step program for more than 50 common complaints that plague many of us. You can learn to change your life today."

– Mehmet Oz, MD, Professor and Vice-chair of Surgery, New York Presbyterian Columbia

"Change isn't easy but if there's anyone out there who can convert skeptics to believers, it's Norcross."

– Publishers Weekly, starred review

"Stop smoking. Slim down. Exit that awful relationship. Not easy. A board-certified psychologist and Distinguished University Fellow at the University of Scranton, the author of more than 300 publications and the coauthor or editor of 22 professional books, Norcross has spent his career researching how people change their behavior and is here to tell you. He’s got a 90-day plan, backed by a free interactive website and entailing five steps. Hope springs eternal."

– Library Journal

“Changing a habit involves two things: knowing how to change and knowing what to change. This book, by a true master scientist of change, is the best book I know about the steps YOU can take to make and to sustain the changes YOU want to make.”

– Mike Roizen, M.D., co-author of the bestselling YOU series

“Finally, a self-help book based on solid scientific evidence by psychology’s smartest myth-buster. The science of change has finally arrived, and the you who starts this book won’t be the you who finishes it.”

– Daniel Gilbert, Professor of Psychology, Harvard University, and bestselling author of Stumbling on Happiness

“Changeology is a powerful tool for those seeking the happiness lasting change can bring. Science tells us that if you can change your behavior, you can increase your happiness. This simple, research-based plan will show you how to begin a new life free of old, bad habits and full of inner peace and well-being.”

– Marci Shimoff, author of Happy for No Reason

"I have rarely read one [self-help book] that I truly felt could bring real, meaningful change into a person’s life. But despite my wariness of the self-help genre, I found John C. Norcross’s Changeology to be one such book . . . for most of the kinds of change that people are already trying to make, Changeology will prove to be a wonderful source of assistance. It has an easy-to-follow formula based on credible research—and even this wary mental health practitioner found it helpful."

– Joseph Maldonado, MS, for PsychCentral.com

“The title says it all. This clearly written, easy to follow, and scientifically grounded guide provides a step-by-step map to effective self-improvement. Already widely known and respected in professional circles, Dr. Norcross is now sharing his work for use by everyone.”

– Gerald P. Koocher, Ph.D., ABPP, President, American Psychological Association, 2006

“When you are ready to move from just ‘talking the talk’ to ‘walking the walk,’ turn to Changeology. John Norcross has accomplished a rare feat—translating thirty years of sophisticated psychological research into practical, understandable, doable steps that really work for changing behavior. I recommend this book as a top choice to achieve important goals.”

– Carol D. Goodheart, Ed.D., 2010 President, American Psychological Association

"Changeology draws strength from decades of impressive scientific research, much of which Dr. Norcross conducted. He manages to translate this research into very specific steps within 5 major phases . . . . Clear, user-friendly, and entertaining, recounting real-life adventures in change and sprinkling in relevant allusions ranging from classic to pop. An excellent and very useful book."

– Ken Pope, PhD