An indispensable user-friendly guide to positive psychology at work, this volume brings together new and established theories concerning optimal workplace functioning that shed light on the nature of fulfilling and sustainable human performance. Organised around a clear over-arching model, it enables the reader to critically examine current research discoveries and to test them against widespread beliefs, as well as against their own lived experience of professional environments. Full of case studies, extracts of interviews and practical hands-on solutions, it aims to become the go-to reference guide for HR and Management Professionals as well as Positive Psychology students for years to come.