Analysis of an artist’ book made by Fernando Augusto, Brazilian artist, in 2008. His artwork is made of interferences in other book, about Amilcar de Castro’ artworks. This analysis starts from the complexity of book in general, a group of several different knowledge and staff, under editor’s response, that assumes himself a composite authorship. Regarding to a book about artist’ artworks, parallels systems touch themselves (artistic and editorial); Fernando Augusto’ intervention is radical by cancelling all signs of identification of editor as a specific author