This issue of the ERS Monograph captures the diversity of pulmonary hypertension in a rapidly changing field. Guest Editors Athénaïs Boucly, Gabor Kovacs and Robin Condliffe have invited world-leading experts to write chapters covering epidemiology and assessment, approaches to diagnosis and management, the application of artificial intelligence and remote monitoring, comorbidities, and multifactorial disease. This issue will educate, challenge and stimulate – it is a useful resource for all healthcare professionals and researchers with an interest in pulmonary hypertension.