I Burn for You by Susan Sizemore - Primes 1

 I BURN FOR YOU by SUSAN SIZEMORE
  book 1 in the Primes series-paranormal romance

 The world holds great danger for Alec Reynard and his kind. As the dark hollows of his soul threaten to overwhelm him, he undergoes secret medical treatments that allow him to bear daylight. Living a double life as a bodyguard, he must also battle the powerful chemistry that explodes between him and Domini Lancer, a mere mortal — and, unbelievably, his soulmate. Domini knows nothing of Alec's true nature. But when danger threatens, he kidnaps her to his clan's stronghold to protect her....and there, he can no longer hide who — or what — he is. As the forces aligned against Domini draw near, Alec wonders whether she'll accept the darkness within him — or whether she's actually a vampire slayer who's cleverly infiltrated his clan.

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