Book excerpt: The internet is so central to everyday life, that it is impossible to contemplate life without it. From finding romance, to conducting business, receiving health advice, shopping, banking, and gaming, the internet opens up a world of possibilities to people across the globe. Yet for all its positive attributes, it is also an environment where we witness the very worst of human behaviour - cybercrime, election interference, fake news, and trolling being just a few examples. What is it about this unique environment that can make people behave in ways they wouldn't contemplate in real life. Understanding the psychological processes underlying and influencing the thinking, interpretation and behaviour associated with this online interconnectivity is the core premise of Cyberpsychology. The Oxford Handbook of Cyberpsychology explores a wide range of cyberpsychological processes and activities through the research and writings of some of the world's leading cyberpsychology experts. The book is divided into eight sections covering topics as varied as online research methods, self-presentation and impression management, technology across the lifespan, interaction and interactivity, online groups and communities, social media, health and technology, video gaming and cybercrime and cybersecurity. The Oxford Handbook of Cyberpsychology will be important reading for those who have only recently discovered the discipline as well as more seasoned cyberpsychology researchers and teachers.