Covenant by Jeanne McDonald

Verily I say unto you, one of you shall betray me this night…
For as long as she can remember, Cameron Scott has been plagued by migraines and nightmares of creatures, places, and events that couldn’t be real – no matter how realistic they seem.
Toby McCloud has spent his immortal existence bound by the laws established by the Guardians of the Covenant who were destined to protect him and his kind long before he was born.
When Cameron and Toby cross paths, everything seems to fall in and out of place.
A family secret.
A dark past.
A forbidden attraction.
Unseen dangers await as they embark on a profound journey of time, passion, mistrust, deception, and destiny.