Captive: The Forbidden Side of Nightshade - A.D. Robertson
Birth and destiny. Sarah and Tristan are born on opposite side of a long standing war between the witches. Sarah is on the side of good, Tristan is expected to lead the forces of evil one day. We do not always fit the molds our elders want us to.

Of course I was hoping Sarah and Tristan would make it work but now a days, you are not guaranteed a HEA. I really enjoyed Sarah and Tristan. Him more than her. Tristan is a very intriguing fellow. Several characters were not who they appeared to be, nice character development.