This book is a detailed study of the expressive potential of video games. The author analyses many examples of games broadcasting messages, related to politics, advertising and education. This study allows Ian Bogost, a media researcher and game designer, to introduce the concept of "procedural rhetoric", i.e. the use of games rules to broadcast messages. This book is very brilliant: full of relevant examples, it features an analysis that will undoubtedly inspires any creator or researcher interested in video games.