Demons of the Ocean: Vampires

Grace and Connor live in a lighthouse with their father, who sings an old vampire song to the twins before they go to sleep.
When their father dies, Grace and Connor are left alone. They leave the lighthouse and set sail, but soon a terrible storm destroys their boat and they end up in the icy water. They never find each other again.
Connor is fished out of the water by the crew of one of the most notorious pirate ships. He is trained as a pirate, learns fencing and soon it turns out that he has the best pirate blood.
Grace ends up on an even more mysterious ship: a vampire pirate ship. During the day it is dead, but at night, after the ringing of a bell, the ship comes to life.
When a mysterious messenger tells Connor that a vampire pirate ship really does exist, the pirates set out in a bloodthirsty pursuit. But who is this strange messenger?
Will Grace and Connor ever see each other again in person?
Vampires is a spooky, suspenseful story for cold-blooded readers.