Reading this book is like sitting across the table from Raph Koster, as he excitedly sketches on napkins and shares his passion and ideas for game design. It’s engaging, informal, and insightful, filled with Raph’s hand-drawn illustrations and some provocative ideas about games. Raph discusses the meaning of games to their players and reveals the surprising secret to the source of fun in games. It’s worth reading by any aspiring game designer or teacher, because after all, the best teachers know how to make a game of learning!