The Sleep Medicine Textbook (2nd ed.) published by the ESRS in 2021, provides a state of the art, significantly expanded comprehensive, all-in-one educational material (15 sections, 92 chapters and over 1,000  pages) structured around the actualized Sleep Medicine Catalogue of Knowledge and Skills – Revision. (Penzel et al. 2021, Journal of Sleep Research). Written by experts in the field and published by the ESRS, the Sleep Medicine Textbook (2nd ed.) provides an European approach to sleep medicine education, and represents the knowledge-base for the ESRS-endorsed sleep medicine examinations. AIMS members also benefit from reduced ESRS member pricing to purchase the textbook .