The Winnicottian Yearbook is a publication of the Brazilian Institute of Winnicottian Psychoanalysis (IBPW) created within the Winnicottian School of São Paulo to preserve, transmit, and publish clinical and theoretical research on Winnicott's maturation theory and develop Winnicott's intellectual legacy. This publication takes the form of a yearbook and aims to annually disseminate original works on winnicottian theory and practice in the English language. This publication was created jointly with several International Winnicott Association (IWA) member-groups and will actively rely on collaboration from all of them and from researchers outside the IWA.