This book explores the different ways sleep medicine is practiced in the world by presenting information from multiple countries from all continents. The editors, all sleep medicine experts, dive into both clinical practice, and research keeping an eye on healthcare needs and disparities, before proposing solutions. The contributions also take into account the social, geographical and political situation of each country, along with demographic considerations such as income levels, adding a dimension of context to the contents. The book is meant to be a reference for sleep medicine practitioners who encounter diverse patients in their daily practice. It also serves as a good resource for anyone interested in the state of global health studies.