Not Fair, Won't Share — Sue Graves

When Nora, Dan, and Henry have trouble sharing at school, they all end up feeling mad. With the help of their teacher, the friends learn that when kids get frustrated, there are ways to calm down, share, and play fairly. 

Our Emotions and Behavior series
The Our Emotions and Behavior series uses cheerful brightly illustrated stories to help kids understand how their emotions and actions are related -- and how they can learn to manage both. At the end of each book, a two-page series of pictures invites kids to tell a story in their own words. A special section for adults suggests discussion questions and ideas for guiding children to talk about their feelings.