Basilisk (Dragon Eye Book 6)

Gold.
It has long been rumored that dragons don’t just hoard gold, they make it. But how? Humans and dragons have fought and died in hopes of learning the secret.
Felix Melikov has made gold, once, almost by accident, and he’s never managed to do it again, nor has he figured out how it happened the first time. He’s determined to sort out the secret.
But he’s not the only one who’s trying to solve the riddle. There are others, ancient foes, who are obsessed with making gold, and they’ll stop at nothing to learn what Felix knows.
Can Felix stay ahead of them and solve the mystery first? Or will this all-consuming quest consume him, too?