Covenant. Immortal Soulless, #4

Tame the dragon. Close the rift. Don't trust anyone. Aviva's new assignment sounds like something out of a fairy tale, except this time the damsel has been tasked with guarding the dragon. Though he's plenty to deal with all on his own, it soon becomes clear that this monster trapped in human form is the least of her worries. The open rift that brought him to Earth threatens the veil of secrecy protecting the supernatural world, and the vampires of Maelstrom need to find it before they're exposed.
Worse, it seems that they may not be the only ones hunting for it. If the strange power that flows through the rift falls into the wrong hands, it could spell disaster for Aviva and everyone she cares about. With only a shifty dragon-man and an inexperienced enchantress by her side, Aviva races to find the rift before the enemy does-a task that only grows more challenging when she uncovers a trail of deception and lies that leads straight to the highest ranks of her clan.