File:OSCharts.jpg

Summary
Hart's Hope First edition cover, source http://www.isfdb.org/cgi-bin/pl.cgi?197217

Fair use in Hart's Hope
Though this image is subject to copyright, its use is covered by the U.S. fair use laws, and the stricter requirements of Wikipedia's non-free content policies, because:
 * 1) The image is used as the primary means of visual identification of the article topic.
 * 2) It is a low resolution image, and thus not suitable for production of counterfeit goods.