To say that this book is a tribute to the first industrial-level printing work with movable type in history would be not telling the truth, since it actually makes various important contributions to the history of printing and design. One of them is that Its gestation starts from questioning the widely accepted hypothesis up to now, which explains that essentially the movable types that were used in the printing of the 42-line Bible had been cast with the same matrix (mold). The second is to conceive to Peter Schöffer as the first graphic designer in history, for taking responsibility for controlling the entire editing process, and defining, together with Fust and Gutenberg, a production of interchangeable parts within a productive model. Without intending to, they established, at our eyes, a capitalist structure. The third is the demonstration of the use of a model to carry out the editing process of the B42, and by which the traditional schemes of the manuscripts were maintained; it will be during the implementation of the process that Schöffer understands the possibilities of typography. Therefore, what we really have is the contribution of an in-depth study –from the typographical point of view– sprinkled with historical, technological and typographical aspects that make it more enjoyable your reading.