Kardiomachy: War of Hearts (Mythos Cycle) (Volume 3)

Megara, renegade witch-princess, is fleeing the ruins of her life. Pursued by the implacable wrath of the Furies, she seeks seven Necromancers, hoping to send them to Tartaros in her place, all the while haunted by the rising fear of repeating her past. Herakles chases after the woman he's loved since childhood, aware of the Furies hounding her steps, and that there is less and less time to bring her to safety. For a war brews, which threatens to rip Olympus asunder. Neither can afford to keep running, but neither can give up the chase.