File:The Mathematics of Magic The Enchanter Stories.jpg

Summary
Cover art from The Mathematics of Magic: The Enchanter Stories of L. Sprague de Camp and Fletcher Pratt, by L. Sprague de Camp and Fletcher Pratt, NESFA Press, 2007.

Rationale
Fair use claimed for Image:The_Mathematics_of_Magic_The_Enchanter_Stories.jpg:
 * illustrates the subject of the article.
 * no free alternative.
 * the size and resolution make reproduction for bootleg copies difficult.
 * reproduction does not detract from the commercial value.
 * Source: http://www.isfdb.org/cgi-bin/pl.cgi?312713