Research for research sake is no longer tenable or affordable; to be valuable to society, research must have impact! This textbook takes the reader on a journey from how the UK Research Excellence Framework assesses impact to real examples of outstanding research impact case studies.  Along the way, Prof. Hugh McKenna describes and explains the case for research impact, the challenges, the link between research impact and evidence informed practice, achieving impact through changing policy and engaging with the public, how researchers can make their research findings more impactful and how research impact is assessment nationally and internationallyIt is written in an easily accessible and understandable style, with reflective exercises amply distributed throughout its pages and helpful guides helping to engage readers and notably health professionals who are often turned off by the normal heavy research tomes. This book makes the complex simple and the wearisome fascinating.