File:Agent 13 the Invisible Empire.JPG

Fair Use for Agent 13: The Midnight Avenger
Source:http://superherobookcovers.com/original/agent13/ag1.html

This is fair use because:
 * the image is for nonprofit educational purposes only
 * it is a low-res copy of a book cover, which could not be used to make illegal copies of the book's cover art
 * it does not limit the copyright holder's ability to sell copies of this book