We are indebted to Ruth Rotkowitz, Dr. Vyga Kaufmann, Dr. Natalie Whiteford, and Susan Brosse for reading earlier drafts of this workbook. Your constructive feedback greatly improved the final product, and your encouragement helped sustain us on our writing journey. We thank Dr. Michael Weissberg, who was the first to urge us to apply our skills as cognitive behavioral therapists to the treatment of insomnia. We additionally thank him and all of the other doctors and therapists who have entrusted their patients to us. We are so appreciative of the people who have sought our help when feeling sleep deprived and vulnerable. It was you who taught us the importance of blending cognitive behavior therapy and acceptance and commitment therapy for better results. Thank you for letting us help you find your “sweet spot.” It has been extremely rewarding to treat so many people with insomnia, given the high success rate and relatively quick results. A heartfelt thank you to everyone at New Harbinger Publications who contributed to the production of this workbook. Finally, we thank our families who endured us working on beach vacations and over the Thanksgiving holiday to complete this project. Your understanding and support are immensely appreciated.