With pleasure I read this excellent collection on state of the art surveys on psychological aspects of the internet. The chapters are of very high quality and very comprehensive. The content ranges from motivational aspects of wikipedia participation over internet abuse and privacy issues to the use of the internet for psychotherapy and for conducting research.
Written mainly for the researcher and for students, the book is relatively dry to read, but at the same time it remains accessible even for the non-psychologist. It contains a wealth of information for anybody interested in the impact of the internet on our society.