Knights of the Borrowed Dark (Knights of the Borrowed Dark Trilogy #1)

An alternate cover edition exists here.

Denizen Hardwick is an orphan, and his life is, well, normal. Sure, in storybooks orphans are rescued from drudgery when they discover they are a wizard or a warrior or a prophesied king. But this is real life—orphans are just kids without parents. At least that’s what Denizen thought. . . .
            On a particularly dark night, the gates of Crosscaper Orphanage open to a car that almost growls with power. The car and the man in it retrieve Denizen with the promise of introducing him to a long-lost aunt. But on the ride into the city, they are attacked. Denizen soon learns that monsters can grow out of the shadows. And there is an ancient order of knights who keep them at bay. Denizen has a unique connection to these knights, but everything they tell him feels like a half-truth. If Denizen joins the order, is he fulfilling his destiny, or turning his back on everything his family did to keep him alive?