Darren Shan 
Tunnels of Blood [EPUB ebook] 

Darren Shan and Evra Von follow a trail of corpses and confront a foul creature of the night. A new enemy or Mr Crepsley?When Mr Crepsley is called upon by the Vampire Generals, Darren and the snake-boy, Evra Von, leave the Cirque Du Freak and travel with him to the city. Whilst there, Darren meets Debbie and his life as a Vampire’s Assistant fades into the background – until corpses are found. Corpses drained of blood… Suspicious of Mr Crepsley’s secretive behaviour, Darren and Evra shadow him across the city and confront a creature of the night who may be the end of them all…