A new book by bestselling author Lucía Serrano about friendship, respect, and the importance of treating each other well. You are a unique person in the world. The other girls and boys in your class are also unique. There are things you may like that someone else may not. There are also those who sing very well, and those who are amazing at reading aloud, or running really fast. We're all different! But do you know what we all have in common? That we like to be treated well. To do this, there are certain things we must know. With this book, you will learn that TREATING EACH OTHER WELL is the most important rule on planet Earth.