Tunnels of Blood - Cirque Du Freak, Bk 3 Author:Darren Shan Darren Shan, the vampire's assistant, gets a taste of the city when he leaves the Cirque Du Freak with Evra the snake-boy and Mr. Crepsley. When corpses are discovered drained of blood, Darren and Evra are compelled to confront a foul creature of the night who may prove to be the end of them all.