The Last River of Neptune: A tale of monsters and gods in Bloomington, MN

Lucia and Isabel are being hunted. Hunted by monsters and gods from ancient mythology that should not exist. Creatures from beyond their wildest dreams and worst nightmares.
Isabel is the key. A war is brewing between the great realms, between the Olympians and the Heroes of Valhalla. A war that mankind can only lose. Isabel stands in the way; the fates say she is the Gods slayer. They say she can save them all.
But time is running out, and their road is perilous. Can Lucia help her sister fulfill her destiny? Only together can they walk the hero's path.