Démons et Merveilles. Critique de la raison pure is a book by the Belgian brothers Olivier and Quentin Smolders. The first is a writer, critic and film-maker. The second is a painter. The book (published by CFC-Éditions) brings together all the projects on which the brothers have worked together, alternating between film projects and painting. In the book, each project has its own grid and compositional system. The use of a modest typeface accentuates these grids, making the book a highly rhythmic and sequenced object.