This study includes six book design critics in which the graphic designer as a co-author in postmodern era. The main impulse that collects these books -which are separated from each other in terms of period and content- in the same category, is not only the responsibility of the graphic designer to make the content read and visible, but also the privilege of having a say and comment on that content. The name of this privilege is “designer as author”. This understanding, in which the author and the designer work together in a peer position, and create the book object, emerges when the designer declares individual freedom, especially in the postmodern design understanding after 1970. Especially in Europe, modernist design norms have given the opportunity to be abandoned slowly, with the advancement of technology, the production forms become more democratic and easier to reach, and above all, the universalization of the design allowed the designer to be an individual. The examples included in the research made a sound in the context of co-authorship at the time of their publication; they were stripped of the mainstream books with their design and provided a new breath to the book design understanding.