William R. Miller, PhD, is a clinical psychologist and Distinguished Professor of Psychology and Psychiatry at the University of New Mexico, where he has been teaching and learning since 1976. His 25 books and many scientific publications reflect his interests in the psychology of change, the treatment of addictions, and the interface of psychology and spirituality. Drs. Miller and C'de Baca began their collaborative research on quantum change in 1990, and this book is the first full report of their work.

Janet C'de Baca, PhD, received her doctorate in clinical psychology from the University of New Mexico. She is currently a research scientist with the Behavioral Health Research Center of the Southwest, in Albuquerque. Her professional interests include cross-cultural psychology and the prevention and treatment of addictive behaviors.