Rachel Williams, a teen author and recovering from her own nail biting habit, wrote this book aimed at preteen and teen girls who also suffer from biting their nails. From demonstrating how common nail biting is, and how you are not alone, as well as the health risks related to, and the benefits of stopping, nail biting in a relatively positive and optimistic tone, this book shows girls that they can stop and that it will be a positive change. Using the concept of 21 days to form or break a habit, this book also includes a 30+ day journal for writing about successes and challenges and planning goals. As a teacher, I would definitely recommend this book to students and their families who want to stop nail biting habits, or potentially other anxiety related habits that can be hard to stop. The book is recommended for girls in the 8-16 age range and I think that is a very appropriate estimation. I so appreciate Netgalley and the publisher for giving me the opportunity to read and review this wonderful book!