It is a bookcase for storing small books of less than 20cm in height.
It is recommended to put 'small books caught in one hand' into 'small bookshelves'.
That way, you can put only books of normal size in high and large common bookshelves,
so you can use them without wasting space and keep your aesthetic taste.
You can simply place books on work desks, bedrooms, and shelves.
And you can easily carry it by holding the handle of the bookcase.
It was inspired by the Ulm chair(designed by Max Bill) and designer Kim Sang Kyu in Seoul, Korea.