The Fifth Gate by HP Mallory

I’ve made it through all the levels of the Underworld, and I’m about to come up against the man who is responsible for all of this…
Ares, the God of War.
And I don’t know what’s going to happen. Sure, I’m a demi-goddess, but my power is nothing in comparison to Ares’.
Not only that, but I’m alone on this mission. After being wounded in the fourth gate, I’ve left Adonis behind.
I can only hope I have an ally in Hades, but I have a feeling the God of the Underworld is playing his own game.
I can only hope I can defeat Ares, find my sister’s soul, and make it out of the Underworld in the two days I have remaining.