User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-7594114-20130802142517/@comment-3146930-20130802215418

I understand the point. You're saying that them dying would make people remember the book. What I'm saying is that even if the book is memorable, people would only remember negative emotions when looking back on it. People like the MoA ending because Percy and Annabeth are together again and willing to fall into Tartarus together, but the readers can't wait to see how they come out together.

I also understand that authors can do pretty much whatever they want with their characters (as they are their characters after all), but it is pretty obvious that Rick shows Percy a lot of favoritism in his writing and considering Percy is somewhat based on his son, killing him off would be kind of... uncomfortable.

Also considering Annabeth is Percy's gf, she is pretty much protected.