Sonnet recommended this book to me on another thread about my DD being bullied at school!
It is an cracker of a book - and actually would be a great read for most primary aged children, as a general self-esteem raiser.
It is written in a very readable style for children from around the age of 6/7 upwards!
I'm going to buy a few copies to donate to the school library - that'll get the bullies on the run