The Undead Possession Series : Book 1: Infestation

A deadly virus leads to a zombie apocalypse...but the worst is yet to come
Samantha's father is responsible for a lab accident that turned 90% of England's population into insatiable, undead creatures. Now they are on the run and fighting for survival. They seek refuge in a seemingly abandoned mansion.
But the mansion is haunted.
Soon, Sam is possessed by a demonic presence, one that aims to use her to elevate the zombie hoards into something much more powerful and deadly.
Sam's father is mankind's only hope. Can the man responsible for the end of the world find an antidote to stop Sam's terrible new super-race, and if so, at what cost?
This series contains strong, adult content. Do not read if easily offended.

Infestation is book 1 in The Undead Possession series.