This book has been great for me as a first parent. The book picks up where my common sense leaves off. I frequently refer to this book after my own child has displayed a particular behavior. Yardsticks has reassured me many times that my 4 year old son is normal...I have given this book too many friends as well as every teacher at my son's preschool. Because the book is broken down by age per chapter, it is very easy to read and undersatnd without feeling overwhelmed.A+