The bookcase is a wheel-shaped wall structure. The wheel is equipped with special pins in the shape of bolts from which the bookcases, or metal baskets whose quantity is defined by the user, are hung. The kit contains adhesive letters with which inscriptions can be formed and glued to the sides by the wheel. The lettering defines the themes or genres of books of interest to the reader by reflecting their creative or scientific side or simply can indicate books read and books yet to be read. As the user fills the baskets the wheel reacts and turns in the direction of the heaviest weight basket indicating the dominant theme with the arrow. The bookwheels can form bookcase groups of various sizes and different numbers of bins, thus allowing the end user to customize, including through the choice of material, both the bookcases and the space in which they are placed.