User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-7594114-20130802142517/@comment-5593616-20130802212403

It would be a plot twist, because everyone doesn't think it will happen. And I didn't say its the only plot twist that could happen; there are lots of scenarios. I just think that if Percy and/or Annabeth die, everyone will be super shocked, therefore it is a plot twist, therefore it is unpredictable, which therefore (last therefore :P) means that it was a good book.