I read many discussions on the best tool to use to write a book. Sometimes the discussion is about what word processor is best for writing the draft or manuscript. To me it is a totally irrelevant question. It really doesn’t matter what tool you use to write your book. You can use whatever is comfortable for you including just a pen or pencil in a simple notebook. Word is my preference for writing my first draft but I could just as well use OpenOffice or even Wordpad that comes free with Windows.
If you do use a word processor keep the style set at normal to avoid any complicated formatting that will cause problems when doing the final layout and formatting for the print or ebook versions. Avoid multiple spaces with the space bar and paragraph indentations with the tab key. Use the normal style with line and paragraph settings that work the same throughout your draft. Keep it as simple as possible because the draft is not the final file for publishing. Don’t begin the final formatting until your editing is completed and you have a final manuscript.