The Fifth - Fiction (or is it?) by Mario Kiefer

The Fifth - Fiction (or is it?) by Mario Kiefer - book promotion companies
https://www.amazon.com/dp/B09J1JVKSD

Kiefer’s tale of the End of Days is ripped straight from the headlines and may leave you wondering whether the Four Horsemen of the Apocalypse already walk among us.  But who is this Fifth and what is his role?