I am number four

Lore, Pittacus

Notes
In the beginning we were a group of nine. There are six of us left. The first three were killed in the order of their numbers. I am number four. I know that I am next.
Location edition Bar Code due date
Fiction 141556
Genre:Thriller
Dewey:F
call #:LOR
ISBN:9780718156473
pub:2010