deathless Night series
The original paranormal romance book series by L.E. Wilson!
A Master Vampire has been missing for seven years—and those closest to him have been cursed by the jealous designs of the female who enslaved him. Determined to find his brother and stop her, Nikulas Kreek and the other five Vampire Council members solicit the help of a family of reluctant witches. However, they soon discover it's not only their united cause drawing them together….
"Entranced from the first paragraph!" - Goodreads