The Internet is transforming business, education, and maybe even ourselves. In this text, Adam Joinson provides a clear summary of the psychology of the Internet, while at the same time drawing lessons from previous technologies as diverse as the early telephone, telegraph and even radio hams. Mixing anecdote with findings from psychological studies, this book provides an insightful vision of the psychology of the Internet, and the implications for the design of future technologies. It is a useful resource for anyone studying Internet behaviour or interested in their own or others' online behaviour.