Seven Days (Seven Days #7)

DAY SEVEN: The final day is here and it all comes to a head in New Orleans. The remaining heroes: Kino, Summit, Accell, and Moonrise make their final stand against the Obsidian Titan with help from villains and allies alike. While the teen heroes: Cosmosis, Amina, Quincredible, and a new heroine go after the source: Khrelan himself. With the clock ticking, it's a rush to save humanity, but even if the alien threat is defeated, what, exactly, will be left of humanity?