The children's picture book "Adventure! Train Maze" by Kazuki Okawara, published by Kotsu Shimbunsha, features various trains such as Shinkansen, limited express, and streetcars. The town is designed as a maze, with two mazes to enjoy on each spread. In addition to maze-solving, it also includes a "find the object" element. This educational picture book is enjoyable for children from around 3 years old to elementary school students. It does not come with a book cover.