This book enumerates famous novels in Japan and from around the world, such as Natsume Soseki's Sanshiro Sugata, and Haruki Murakami's A Wild Sheep Chase and, based on Jungian psychology knowledge the author is good at, analyzes the concept of 'youth'. The author thinks that youth is closely connected with dreams and games, enumerates the puzzles and problems young people would encounter in the process of growth, and gives some views thereon.