Twilight Fall
by Lynn Viehl, 2008
Series: The Darkyn

"Immortal Darkyn Lord Valentin Jaus and landscape artist Liling Harper are two lost souls. Brought together by fate, bound together by passion, Valentin and Liling find solace in each other’s arms. But the ties that bind them are deeper—and more dangerous—than either of them can possibly imagine..."
(From Amazon.com)