An architecture project is not so different from a bookshelf. Before it is erected, a building is a sum of drawings, plans and written documents. Its matter is printed on paper, archived in files or shelves. Before it finds its definitive form, the project takes from the book as much as from the palimpsest. Any project-eventually built or not-sediments its strength and relevance by an accumulation of drawings and representations at different scales. The sketch and the final building express the same thing, but they say it better and better, through the different phases of the project.