There are several ways to print a book using Microsoft Word. One way is to create a document in Word and upload the file to a print-on-demand website, such as Lulu.com or Amazon's Create Space. You have a variety of page size options, and all you need to do is make the appropriate page size options and margin settings for your document, and the book will be printed on the proper size paper, with printing on both sides of the pages. But, if you want to print a book on your home computer, you will format your pages differently.
Understand the concept of page signatures. In printing, a signature is a sheet of paper with several pages printed on one sheet. To print an 6 1/2" x 8 1/2" book in Word, you can instruct the program to print your document on signatures, which can be printed out and assembled into a book. You can bind the book, using a comb binder at the office supply store.
Open your document in Word. Click on "File" and then click "Page Setup" and choose the "Margin" tab. In the menu that opens select "Book Fold" in the drop-down menu next to "Multiple Pages."
Notice that the moment you selected "Book Fold" the words "Inside" and "Outside" will appear near the margin adjustments on that menu. Select how much space you want along the inside and outside of the margin. Notice that Word has also changed the page orientation to "Landscape." Keep the sheets per booklet setting at "All" to apply to the entire book.
Add space to the gutter box if you want additional space along the fold area of your book. Format you book, adding page numbers and necessary pages, such as a title page or copyright page.
Print the document by clicking on "File" and "Print." In the print menu that opens, check the box next to "Manual Duplex." This will print out half of the pages of your book. You will then insert these pages upside down in your printer and print on the opposite side of the pages.