An ISBN is assigned to each edition and variation (except reprintings) of a book. For example, an ebook, a paperback, and a hardcover edition of the same book would each have a different ISBN.[11] The ISBN is 13 digits long if assigned on or after 1 January 2007, and 10 digits long if assigned before 2007. An International Standard Book Number consists of 4 parts (if it is a 10-digit ISBN) or 5 parts (for a 13-digit ISBN):
Each document in your book can be numbered, and these numbers can be used as automatic chapter numbers. Automatic will increment from the previous document’s number, or you can choose “Same as Previous in Book” if it’s still the same chapter but broken into two or more parts, or you can arbitrarily number it anything you want to. This can save time if you have a large number of chapters that change order frequently, since the numbers will update automatically.
Either number may be used in addresses. Sometimes, businesses will use both numbers to avoid confusion, usually putting the descriptive (or registration) number first: "Hlavní 20/7". The two (or three) types of numbers are commonly distinguished by colour of the sign. Each municipality can have its own traditional or official rules and colours. In Prague and many other Bohemian cities, descriptive numbers are red, orientation numbers are blue and "evidential" numbers are green or yellow or red. In many Bohemian municipalities, descriptive numbers are blue, black, or are not unified. In Brno and some Moravian and Slovak cities, descriptive numbers are white-black signs, orientation numbers are red-white signs. Many cities and municipalities have different rules.
One solution is to format the heading with the style and follow it with a hidden paragraph mark. You should format the text in the next paragraph with a style that is not included in the Table of Contents. A hidden paragraph mark keeps the text together on one line when it is printed, even though it is actually two separate paragraphs. The Table of Contents command picks up only those paragraphs with heading styles and places them into the Table of Contents.
 	Note  If TAB and SHIFT+TAB do not work for changing the indents for outline numbering, you probably have the option Tabs and Backspace set left Indent turned off. To change this setting, from the Tools menu, choose Options. Select the Edit tab and check the option Tabs and backspace set left indent. As an alternative to turning this option on, you can instead use ALT+SHIFT+LEFT ARROW or RIGHT ARROW to increase or decrease outline numbering.  numbering using publisher