Book nine in the Blood Slave: Nibiru Vampire Warriors Series
Stride makes a hasty and cataclysmic decision to take his position as ruler of the underworld, sending Zero to a new and hopefully happy life far from the evil machinations of Planet X.
Stride takes control of Planet X, eliminating the vampire queen and taking over full control. However, he can't do this with Zero by his side and after some scorching lovemaking, sends his blood slave to a new life on Earth.
As Stride grapples with the reality that his demonic reign entails, Zero lands on a strange and different Earth that resembles nothing he remembers. He discovers that the great final war has given rise to a whole new race of beings and, forced to plunge into a new existence, all he can think about is...Stride.