What is the main conflict in Killers of the Dawn by Darren Shan?

Killers of the Dawn is one of the novels in the Cirque de Freak series by author Darren Shan. The story follows the main character, narrator and author, Darren Shan, the Vampire Prince. Shan and his fellow vampires are on a hunt. The hunt is to find and kill the Lord of the Vampaneze, which is the vampire enemy in the War of Scars.