The Oxygen We Burn: Prophecies always catch up (The Oxygen We Burn Duology) by Ellie Gabriels

Rule one of a coven mission: don't fall in love with the target. Rule two: definitely don't pick the wrong target first. Layla — witch, spy, holder of very strict instructions not to fall for the target — is on a college campus in the human realm. In autumn. In pug socks. And she is the last hope of a realm that is days away from collapsing. The barrier between worlds is failing. The prophecies are fulfilling. The Coven has been driven from their home, the ground splitting open beneath them. She thought she'd found him. She was very, very wrong. The right prince is brooding, secretive, and has a stare that knows things she hasn't told him. The right prince is the best friend of the one she's already kissed. And the right prince may have the key to save the realm. Read more