Recently acquired a copy of Dragonology via an Estate Sale, and there were no rules. Based on the article at board game geek, it looks like we have everything we need, except the rules.
I followed several links in internet searches, but they seemed to lead to phishing sites. I couldn't find any legitimate (or non-evil) looking download for the rules.
Board Game Geek doesn't have an "official" website either for the game, nor could I find one.