Dragon Harem by Nina Rains

Dragons. A warrior princess. An immortal king and a prophecy set by gods. This paranormal fantasy romance sends you to a magical adventure of passion and love…
War loomed over the Kingdom of Elastin.
The devourer of nations, vampire King Apollyeon threatened to attack
to feed his hungry ever-growing legions with Elastinian flesh.
I, Princess Aurora, vowed to stop the demonic ruler.
Not for the love of my kingdom.
But to save my beloved sister, Queen Saicin.
For over two thousand years a legend had been passed down from a generation to generation.
According to it, a dragon would come and protect Elastin from all evil, living or dead.
It was all a lie.
A prophecy foretold that a betrayed dragon would rise from the underworld to take revenge on Elastin.
Only a woman who could claim the hearts of three dragons could slay this cursed creature and save the kingdom.
I knew I had to become that woman, against my destiny.
I would have to rewrite the prophecy set by the mighty gods.
My only option was to defy the heavens.
See me, the stars of Cassiopeia.
Hear me, the valleys of the New East Mountain.
No god can stop me.