The book is printed and hence maintained in two parts, the interior and the cover. Interior of the book includes the complete content of the book - everything except cover, everything that should be printed on the interior pages. These include table of contents, preface, foreword, title page, copyright information and anything else you want in the book. The file must be prepared according to our specifications. Remember that we do not add anything from our side to the book before printing. So, the interior file should be prepared to include everything you want printed inside the book. Even if you have taken our formatting or editing services, while submitting the book you must make sure that the files are exactly how you want them printed.