Lifeblood

Jonah Rowe thought he had the 11th Percent figured out.
Spirits were real, and he had access to ethereal powers. He got that. But he hadn't expected this: this was one threat too many. One revelation too many.
As ethereal monsters prepare to ravage Rome, Jonah is the only thing in the way of the ancient city being bathed in lifeblood. His survival depends on him confronting the one thing he never thought he'd have to.
His past.
Lifeblood is a standalone novel, and can be enjoyed even if you haven't read other books in the series.