The Dragon Society. The Obsidian Chronicles, #2

Dragons had preyed on humans since time immemorial, and no one had ever found a way to kill them. Now, though, Arlian had learned the secrets the dragons had hidden from humanity for centuries. He knew how the dragons could be destroyed forever, and he intended to see it done. The only catch was that several humans, including Manfort's most powerful men and women, had to die to make it happen. Some of them did not intend to cooperate.
Indeed, they preferred to cooperate with the dragons instead, to protect themselves, no matter how many innocents might die as a result. And Arlian would have to defeat this unholy alliance if he ever hoped to end the draconic threat.