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

This is the sequel (continuation) of After. Hardin and Tessa's relationship will be tested in ways she never expected, but he knew of all along.