The Demon Headmaster is a children's book series written by Gillian Cross. The story follows a group of children who attend a school run by a mysterious headmaster with hypnotic powers.
The headmaster, known as the Demon Headmaster, uses his powers to control the students and staff, turning the school into a place of fear and manipulation.
As the children uncover the headmaster's true intentions, they must band together to stop him and free the school from his control.
The series explores themes of power, control, and the importance of standing up against tyranny.