Nightborn

The High Lord of the Immortal Darkyn has sent his most trusted warrior, Korvel, to retrieve a coveted scroll that's rumored to contain maps to Templar treasures and the secrets to eternal life. Uniting with Korvel to recover the dangerous artifact is Simone Derien, the daughter of the scroll's guardian, and a woman with many deadly secrets...

This is #1 in Lords Of The Darkyn Series.