Zeus’ Spark by Ember-Raine Winters

Welcome to Halfling Academy, where the Greek Gods are real and danger lurks around every corner.

Students at Halfling Academy are going missing, and with each passing day, the wards around the school are failing.
The monsters of myth are on the attack, and even Zeus’ daughter, Beth, is helpless to stop it.
So when the oracle names Beth the champion who will save the school, she and her friends all fear that their eagerness to do whatever it takes won’t be enough.
But for Beth, bravery isn’t the only thing this quest will require. It will require that she trust the boy who once betrayed her heart: Jayden.
Whoever is bringing the monsters back doesn’t just want to destroy the academy, though. They have plans. Plans to overthrow the king of the gods and devastate the entire world.