It’s Book Three (and apparently last) of the New Olympus Saga superhero series by C.J. Carella. I got into this series via Kickstarter: I’m looking forward to buckling down and reading Apocalypse Dance (New Olympus Saga Book 3)… just as soon as I read Doomsday Duet (New Olympus Saga Book 2), because I am massively behind on my schedule. But I’m moving it up to the top of the list: the first book (Armageddon Girl) was quite fun.