This book costs $11 with its new of a Happy Retrain Your Brain to Boost Your Serotonin, Dopamine, Oxytocin and Endorphin Levels ( No need to pay more. The old edition was discontinued by the author as the self-published work got a publisher. The new edition has lots of the worksheets that readers requested. Don't even think about paying for this old edition. If you don't trust this message, contact the author. (I love to hear from my readers.) You are wired to seek more of whatever felt good before. You can re-wire yourself by repeating a new behavior for 45 days. This book helps you choose healthy ways to stimulate dopamine, serotonin, oxytocin and endorphin. Dopamine is the good feeling you get when you approach a reward. Serotonin is the good feeling of getting respect. Oxytocin is the feeling of trust, and endorphin is the euphoria that masks physical pain. These happy chemicals were not meant to surge all the time. They fall back to neutral so you're ready to respond to new information. You can accept your natural droops instead of rushing to fix them. You have power when you know how your brain works, and it feels good.