Burn Bright. A Dark Star Novel

Audrey Whitticomb saved her entire city. Well, kind of. The superhero Morning Star (who just happens to be Audrey's mom) might have played a small part, and her sidekick, Leon???Audrey's sort-of boyfriend, who is gorgeous???and frustrating???maybe helped, too. But after two peaceful months, there is a vicious new threat in Minneapolis. Her name is Susannah, and she's a Harrower, a demon hell-bent on destroying people like Morning Star, Leon, and Audrey???the Kin.
Like others before her, she seeks the Remnant, a Kin girl who has the power to unleash the inhabitants of the Beneath. But to what end? Audrey already has a ton on her plate: dealing with her best friend Tink's boy drama, helping her other best friend Gideon figure out his nightmares, and exploring the highs and lows of "dating" Leon. But when she develops a powerful new ability, Audrey seizes on the chance to fight, despite her mother's protests and Leon's pleas.
As Audrey gets closer to figuring out Susannah's motives and tracking down the Remnant, she'll uncover more than she bargained for. The terrible truth is staring Audrey in the face. But knowing the truth and accepting it are very different things.