Demigods: Children of Olympus book 1 "Gigantomachy"

This isn't Percy Jackson.

veiled from mortal sight by the power of the Mist, demigods born of the Olympian gods have protected the mortal world from the forces of Chaos attempting to undo all of civilization and give rise to what dwells within Tartarus.

Backed by the United Godling Republic for nearly 2000 years the demigods have gone face-to-face with the descendants of monsters, both natural and cursed, in order that civilization may continue uninterrupted and Olympus remains as the powers above.

Now the forces of Chaos have banded together, setting aside their differences to serve the House Gigantes as they rise to form against civilization, the Republic, and Olympus itself. Directing their efforts to eliminating all mortal children of Ares, puts the war god's youngest child Max Duell at the center of cosmic conflict.

Come and see the world the way it truly is and experience the glory of heroism the way it is meant to be executed. For the first time in nearly 3000 years, Calliope has spoken.