User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-5247339-20130622090134/@comment-5593616-20130623131849

I don't think its that unlikely that Percy's gonna die. I mean, think about it. Percy dying would be a really big twist, and authors want their books remembered. If Percy died, in 30 years we'll all be like "Remember at the end of HoO when Percy died?"

Plus I think Percy dying would help the other characters grow.