In reading order
Cirque du Freak: A Living Nightmare
Darren Shan
Cirque du Freak: The Vampire's Assistant
Darren Shan
Tunnels of Blood
Darren Shan
Vampire Mountain
Darren Shan
Trials of Death
Darren Shan
The Vampire Prince
Darren Shan
Hunters of the Dusk
Darren Shan
Allies of the Night
Darren Shan
Killers of the Dawn
Darren Shan
The Lake of Souls
Darren Shan
Lord of the Shadows
Darren Shan
Sons of Destiny
Darren Shan