In this one-of-a-kind book, each text-written page is accompanied by an illustration that ease the understanding of the text. Besides its unique shape, this book is also brilliant content-wise. Raph Koster, a famous American Game Designer specialized in MMORPGs (Ultima Online, Star Wars Galaxies, Everquest 2), presents a theory to explain why people like to play. According to him, the "theory of fun" is due to the fact that the human brain is happy when he learns, and games happens to provides him with tailored mental challenges. A classical book that any Game Designer and researcher should read...