Two by Twilight (Run from Twilight & Twilight Vow)
By Maggie Shayne, 2005
Series: Wings in the Night

"Run from Twilight - A serial killer who strikes by the light of the full moon has made Mary McLean his next target. She knows she should be cautious, but she can't stay away from Michael Gray, a mysterious man with an unearthly secret. But is he there to protect her? Or is he the real danger?

Twilight Vow - Longing to learn his secrets, Rachel Sullivan found herself a willing captive of Donovan O'Roark. But the young Irish beauty never envisioned his true identity. And neither one was prepared to face the growing hunger they felt for each other..." (from Amazon.com)

Paperback Info: ISBN 0778322661, Mira Books