The Scarlet Fox. The Raven Warrior, #2

Not everyone agrees with the status quo. Senior year is coming to an end, and Anna finds herself being thrust into the hell that is adulthood. The fire priestess has the entire nation waiting with bated breath for her eventual career shift from student to full-time soldier, and she's more than happy to do so. But with the announcement of her new status comes responses from parties that aren't too happy about it.
This unhappiness isn't just in words but with threats that put the entire country at risk. Now, with Edwin by her side, Anna is pushed to her limit with strenuous training to defend her classmates and her family. The clock is ticking, and the two teenagers have only until graduation to prepare for an invasion from a group that wants to destroy all people like her. This invasion is led by a terrorist organization called The Scarlet Foxes, who were thought to be long gone for the past decade.
This group desires to take society back to a simpler time with no magic and no technology, leaving all knowledge to be dispersed by themselves. Anna and Edwin must stop this plan from happening, or else face a new, darker world.