The Rift by JT Stoll

A bitter civil war from a world of magic has spilled over into the small California town of San Luis Obispo. In a desperate act, a warrior from the world of Ruach gives soul armors—the ultimate weapons of his world—to four high school students.

This sounds like the exact opposite of how Vero would like to spend her senior year. Poor and new to the area, she finds surviving in her new surroundings hard enough without stepping into the middle of a war of wizards.

Unfortunately, two soldiers from the other world know what she looks like and want her dead. In the small town of San Luis Obispo, it’s only a matter of time before they find her. She might have to fight, whether she wants to or not.