Nightshadow Chronicles — Christopher Scott

The book is set in a seemingly normal part of New York. However all is not as it seems as a object of incredible magical power is stolen. A group of warriors known as the Nightshadows are tasked with finding and retrieving the object with help from the high races.

By accident Katarina, is thrust into this world after a post concert attack by something. With a chance two Nightshadows manage to save her from the attack. Purposefully given something that would make her forget. An accidental encounter a few days later, after she recognizes one her saviors at a record store. She takes an exciting and dangerous journey, into the world just beneath our own.