The Revenant Runner

Demons attack. Angels defend. Heaven and God the Father are the traitor's final prizes as he marks all mankind for extinction. How can Steven Popoford and his small band possibly save mankind from the Devil's spawn?
¿¿A Shape-shifting dark angel. A scary, riviting, wild ride of minereading nanobots and technosphere subjugation. What more could ruin newlywed Steven Popoford's day? Much more! Can he survive betrayal, insanity, and even death to eviscerate the belly of the Beast?
Life is sweet for Steven Popoford and Millie. The evil that nearly killed them has passed, and tranquility prevails until there's a knock on their door. When Millie gets up one morning, Popoford is missing. She tracks him through the woods and finds him nearly dead.
He survives but is infected with a nanobot that spreads its tentacles throughout his neurons, creating a two-way communication channel with a satanic demon. This "gift" also hooks him up with Millie and an extraordinary infant whose intellect day-by-day is growing exponentially. The shapeshifting demon is his son.
Fighting his slavery to the demon, creating a way to sequester his thoughts, and waging all-out war against the demon's cabal, Popoford must put his life and all he loves at risk even unto death for them all.
Popoford thanks God He's on his side and rides against the angels of Hell.