Daria Kuss is a Chartered Psychologist and Senior Lecturer at Nottingham Trent University, and has worked with clients suffering from internet addiction in a clinical setting. She has presented her research across Europe, and has published her findings prolifically in peer-reviewed journals and books. This is her second book.Mark Griffiths is a Chartered Psychologist and Director of the International Gaming Research Unit at Nottingham Trent University. He has published over 450 refereed research papers, three books, 120 book chapters and over 1000 other articles, and has won 14 national and international awards for his research.