The Love of Danger — Jeremy Zimmerman

Jamie Hattori can't get a break. As the superhero Kensei, she defeated the goddess Eris and figured her life could just get back to normal. Or, at least, as normal as things can be when you fight crime and can talk to the spirit world. But now her girlfriend is flaking out on her, her parents have separated, and a World War Two supervillain has come back from the dead with plots to kill Jamie. As if that wasn't bad enough, she has to deal with two of her least favorite people: her grandparents.