Goodreads summary:

A SACRED OATH
A FALLEN ANGEL
A FORBIDDEN LOVE

Romance was not part of Nora Grey's plan. She's never been particularly attracted to the boys at her school, no matter how hard her best friend, Vee, pushes them at her. Not until Patch comes along. With his easy smile and eyes that seem to see inside her, Patch draws Nora to him against her better judgment.

But after a series of terrifying encounters, Nora's not sure whom to trust. Patch seems to be everywhere she is and seems to know more about her than her closest friends. She can't decide whether she should fall into his arms or run and hide. And when she tries to seek some answers, she finds herself near a truth that is way more unsettling than anything Patch makes her feel.

For she is right in the middle of an ancient battle between the immortal and those that have fallen - and, when it comes to choosing sides, the wrong choice will cost Nora her life.

This book is OK so far. Some parts have made me cringe (like the things that Patch says to Nora that are supposed to be "cool" and "mysterious" but just seem stalker like and weird) but the plot is pretty good, and I think I might like it! From what I've heard, it's one of those books that you either love or hate. My sister definitely falls into the second category. She hated this book so much she planned to burn it at a bonfire she was going to with some friends, until I convinced her to give it to me. I will write a review of it once I finish reading it.

UPDATE: 10/26/17 : My review
It was an not an OK book. I understand why my sister wanted to burn it.