It's good that it was the Seibu Ikebukuro Line (Kotsu Shimbunsha Shinsho 185) by Shoji Sugiyama
This is a new type of walking guide that explores the suburbs of Tokyo (Musashino and Tama), primarily along the Seibu Ikebukuro Line. The knowledge this book provides will transform towns into stories, making ordinary streets and mundane scenery appear different.