Authors’ CommentThe designated space for the book library in the Mater space is a flexible one. Going beyond the patterns of a compact library, true fragmentation of the geometry into smaller modules is obtained the optimization of the quantity of material used and also a faster assembly. The library is divided in two registers, a fixed one at the upper half and a dynamic one at the lower half. Considering the limited space, some of the modules become chairs, obtaining a triple function. Winning space for storage these can be used to access the upper part of the shelves. The changeableness of the modules offers a different layout of the space with each change.