This is a story revolving around a boy who thinks their is nothing special about him and his foster family goes out of their way to make his life miserable. Then one day he discovers he is a famous wizard and goes to a new school and makes tones of friends and has a great adventure..
Really this could be used for multiple grades, but i would choose around 6th. They can test on it for one thing now, and if needed you can add it to many different units including anti bullying or creativity in writing .