Alexis Moonlight - The Cross Knight Chronicles, #1

The year 2066, October seventeenth, everything changed. Creatures only believed to exist in fantasy novels and horror movies crawled up from their graves and declared in one powerful roar that they were the supreme species. The immortals. For mankind, the end days were here!The devil spawns rapidly multiplied, turning their victims into demons against their will. They spread around the globe like a plague.
Humans died in droves. Blood and tears ran like rivers in the streets. Mankind was forced to put their differences aside to survive. Such a shame that's what it took. Maybe that was the idea. Maybe that's why God had forsaken the human race. It was because they had forsaken him.