Darren Shan 
Volumes 3 and 4 — Slawter/Bec [EPUB ebook] 

The king of horror’s demonic symphony in ten volumes, now available in omnibus editions — each containing two titles in the spine-chilling Demonata series.Slawter:Nightmares haunt Dervish Grady since his return from the Demonata universe. When a legendary cult director calls in Dervish as consultant for a new horror movie, it seems a perfect excuse for a break from routine and a chance for some fun.But being on the set stirs up more than memories — and soon, the Slawter commences…Bec:As a baby, Bec fought for her life. As a trainee priestess, she fights to fit in to a tribe that needs her skills but fears her powers. And when the demons come, the fight becomes a war.But the final conflict demands a sacrifice too horrific to contemplate…