Martyr by TL Reeve

Legend says there will be one woman who can bring about the end of the apocalypse.
Nova Blom, (pronounced bloom) carries the weight of the world upon her shoulders. As a full-time student at TSU majoring in Anthropology with a minor in Archaeology, she doesn’t have time for generational stories or prepper “end of the world,” crap. She believes in science and what cultures/society can tell humanity about the follies of their past.
Four seals have been broken.
Low and do I see four angels and death was in the lead.
Pest, Misery, Reaper and Murder have been released of their celestial chains by an unknown source. Their job is simple, bring chaos to the land to herald the coming of Lucifer. However, the sins of the flesh have consequences.
Legend becomes reality.
Nova is willing to do whatever it takes to save the world. Including, forging a pact with the devil and his four horsemen. Their time together is limited, and they must find the source before the seventh seal is broken.
Can Nova trust the harbingers of the apocalypse or is it the end of the world as she knows it?
Behold a pale horse: and his name that sat upon him was Death and Hell followed him…