In Requiem, Emilio Chapela restructured the system of organization in the library of David Alfaro Siqueiros and treats this replica as a new strategy to navigate the muralist's collection. Revealing of his worldview is the fact that Siqueiros organized over 2,000 books in three main categories: Art, Politics and Others. Considering this classification as an entry point, Emilio studied the library and pointed to the contrasts in terms of content, hidden by the previous system.

Maintaining the original categories, Chapela created exact copies of all the books in wood. Respectively, the colors red, blue and yellow located on the spine of each book represent Art, Politics and Others. Although Siqueiros only read Spanish, English and French, his library contains texts in Russian, Japanese, Greek, Chinese, English, Italian and German. In the replica, these are shown with other colors, the duplicate ... allowing for further interpretations of Siqueiros's political standpoint. For Chapela, Requiem can be appreciated as a funeral procession that refers to the library's conceptualization.