He's pretty hot, for a babysitter.

Aeons once ruled the world. Now, their empire lies in ruin, and the survivors hide on the fringes of society. Nahlia is a librarian's apprentice who's obsessed with Aeon lore, scavenging for hints of their legendary power. But others are searching too, including the Templars who seek to hunt down the Aeon survivors. When the Templars attack her family, Nahlia is forced to infiltrate a secret academy and rise beyond everything she's ever known. https://davidmusk.com/books/aeonica-the-lost-redeemer