Transfer of knowledge is an important issue throughout all scientific disciplines, especially in the medical and psycho-social feld. The issue of worldwide knowledge transfer in child mental health is one of the aims and goals of the journal Child and Adolescent Psychiatry and Mental Health (CAPMH). The demand for mental health training is high worldwide, and especially in low- to lower-middle income countries, where inadequate access to knowledge resources in the field of child and adolescent mental health (CAMH) is prevalent. | Knowledge transfer: A worldwide challenge in child mental health: A recommendation to the readership of CAPMH concerning the revised version of the IACAPAP Textbook of Child and Adolescent Mental Health