9 books in series

Cirque du Freak

Cirque du Freak is a 9-book series with 9 released primary works first released in 1993 with contributions by Darren Shan.

Cirque Du Freak #1: A Living Nightmare
The Vampire's Assistant
Tunnels of Blood
Vampire Mountain
Trials of Death
The Vampire Prince
Hunters of the Dusk
Allies of the Night
Killers of the Dawn