The material on the copyright and other introductory pages of the book make it clear that this book is written in a universe called The Borderlands, created by Terri Windling. It is slightly confusing, because the reader is dumped into a strange world without very much explanation; it felt as if I was supposed to have read these other books (which I'd never heard of) before this one. But the book does tell a complete story, and by the end of the book I'd managed to pick up a good enough understanding of the setting that I didn't have any problem understanding what was happening. It's a solid, action-packed story, and while it sort of fits in the genre of modern urban fantasy, it's definitely too original to label as "just another modern urban fantasy". It has some interesting things to say about running away and the meaning of home.
9 out of 10.