These are important steps in order to maintain the flow of your book into production! Of course, all of the above pages may not pertain to your book, or are not necessary. Therefore, you are to choose which ones you'd like to include in your book. Title Page, Dedication, Preface, Main Text are essential, however.
Remember, also, that all this information is written not only to inform you of the steps for a possible future book you may be working on to be published, but it is also meant to motivate you into getting the work accomplished, too! Until tomorrow...bless you all!