Книга : This object is usually neither big nor small but sometimes it can be enormously big or very tiny. It is traditionally made in form of a rectangle. It can be virtually any color. This object is mostly made of wood. We usually use it for discovering new interesting things or just for entertainment. It  may be used in different ways , for example we can even burn it or fold paper planes of its parts , and nowadays it almost fully replaced by its more modern analogues.