Conquest Chronicles, an USC Trojans community

Tommy Trojan - Stolen! This is from a book called The Mythic Warrior's Handbook, a humor book that provides a light-hearted look at Greek mythology. Every chapter begins with this image, clearly a pencil drawing of the top half of Tommy Trojan. Tommy and USC are not mentioned or credited anywhere in the book. I'm not sure if it constitutes a copyright violation (it's an original drawing, after all) but it would have been nice to give credit to the school or the sculptor or someone. And isn't it interesting that the two authors provide only their first initials? This is probably some kind of global conspiracy.