"Summerhill: A Radical Approach to Child Rearing" is a book by A.S. Neill that outlines the principles of Summerhill School, an experimental school founded in 1921 in England. The school emphasizes freedom and self-directed learning, allowing children to choose their activities and lessons. Neill believed that children learn best when they are free to explore their interests without strict rules or pressure. The book challenges traditional educational methods, advocating for a child-centered approach that respects individual needs and desires. Neill's philosophy promotes emotional well-being and personal responsibility, arguing that a nurturing environment fosters creativity and happiness in children.