A great videogame analysis book written by one of the founders of the scientific study of games: the ludology. In this book, Jesper Juul explores the connections between videogames and fictional worlds, and he highlights the special features of videogames when it comes to "tell stories." The first part of the book features an essay about the definitions of "games" and "video games" which were heavily quoted (both endorsed or criticized) by most of the following scientific studies dealing with the same topic. A must-read.