Moonstriker (The Summertide Chronicles) by Sam Burns

I’ve spent the better part of a decade trying to save the world. Twice a century, Mount Slate threatens to erupt, and for my entire life, the four families in charge haven’t seemed to care about their impending doom. So it fell to me to try to fix things. To make peace. Me, a man whose greatest skill is pissing people off so much that they challenge me to a duel, and then killing them in that duel. Now the moment is here, and my clever stone is telling me that one man—a sweet, innocent, infuriating judgmental bastard—is the only one who’s capable of saving the world. And I have to help him do it. I’m starting to wonder if the world is even worth saving. Read more