Handmaiden of The Sun: Book Two - Resolution

Trixie Treat is still only fifteen years old.
But suddenly, all kinds of interesting people are trying to kill her.
People inside her school.
People outside her school.
And one particularly large being who inhabits its own substantial space in our galaxy, but who isn't too keen on following the rules of the "game" Trixie is forced to play.
The stars have set a Task for Trixie.
Evidently, not everyone wants her to complete it.
As the story accelerates towards its cataclysmic conclusion, the friends helping her are increasingly in danger. Her family is in danger (the intervention of highly-paid assassins being a distinct possibility). And if she can't deliver when it counts, a whole lot of other people are in danger too.
Plus, she has a life of her own to lead. And the fact that she has to spend all this time on Conflict, Plotting and just generally Staying-Alive is really, really beginning to annoy her!!