«Cain's Identity» by Tina Folsom

Scanguards bodyguard Cain struggles with amnesia, however, the curtain to his past finally begins to lift when a mysterious stranger appears, revealing that Cain was the victim of an assassination attempt. It turns out that not only is Cain a powerful vampire king, he's also engaged to Faye Duvall, the female vampire who's been haunting his dreams.

When Faye thinks Cain is dead, she's devastated and can only keep going because she knows her clan needs her. Out of loyalty and love for her fellow vampires, she agrees to marry Abel, Cain's brother, and is shocked when Cain returns to reclaim his throne.

Cain is determined to recapture the love he once shared with Faye. But the assassin won't give up and his ruthlessness knows no limits. Backed up by his loyal friends from Scanguards, Cain suddenly finds himself in a fight to the death and confronted with a choice: to either save his kingdom or his queen.

Scanguards Vampires:
Book 1: Samson's Lovely Mortal
Book 2: Amaury's Hellion
Book 3: Gabriel's Mate
Book 4: Yvette's Haven
Book 5: Zane's Redemption
Book 6: Quinn's Undying Rose
Book 7: Oliver's Hunger
Book 8: Thomas's Choice
Book 8 1/2: Silent Bite (A Scanguards Wedding Novella)
Book 9: Cain's Identity
Book 10: Luther's Return
Novella: Mortal Wish
Book 11: Blake's Pursuit (Spring 2016)

The Scanguards Vampires series is nothing like the Vampire Diaries, Vampire Academy, Shades of Vampire, or Twilight. It's a vampire romance series for adults who like their vampires with a bit of bite–and a lot of hotness! This vampire series takes place in San Francisco.

Out of Olympus Series
Book 1: A Touch of Greek
Book 2: A Scent of Greek
Book 3: A Taste of Greek

Venice Vampyr Novella Series
Venice Vampyr (#1)
Venice Vampyr (#2): Final Affair
Venice Vampyr (#3): Sinful Treasure
Venice Vampyr (#4): Sensual Danger

Eternal Bachelors Club
Lawful Escort
Lawful Lover
Lawful Wife
One Foolish Night
One Long Embrace

Stealth Guardians Series
Lover Uncloaked (#1)