Download the Firefox browser and install the FireShot add-on. Both can be found at the Firefox website (see Resources below).
Go to Google Books and choose a book. Scroll to the page you wish to print.
Click the "Full Screen" icon at the upper right.
Use the "+" and "-" symbols to zoom in or out and resize the page to fit the screen. In most cases, you will need to zoom out.
Right-click within your browser and click on "FireShot--Take screenshot (entire page) and ...". Then choose "... Edit."
In the FireShot editor, click and drag to draw a box around the image of the Google page you wish to print. At right, click "Crop."
Save the cropped image of the page to your hard drive as a JPG file.
Open the JPG file in your image viewer and print the image.