The most important and successful book by Korczak is now available in its 17th revised edition. It not only presents the text of the four central works, "The Child in the Family," "The Boarding School," "Summer Colonies," and "The Orphanage," in updated spelling, but also provides a new scientific classification based on current research. Sabine Andresen demonstrates that Korczak deserves far more than general admiration, which he undoubtedly merits for his life's work and his exemplary behavior up until his death. Furthermore, his pedagogy can be made fruitful for a very contemporary encounter on equal terms, granting the child an independent and serious role in the educational process. Korczak's legal proceedings groundbreaking anticipate today's participation processes in kindergartens and schools.