User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-78.180.247.183-20130530102644/@comment-170.235.245.53-20130530115248

Maybe it will have a split cover, one side shows Percy and Annabeth staring at the Doors of Death in Tartarus, and one the other side Jason and the seven are staring at the other side. Or maybe the Seven are staring through the doors and see Percy and Annabeth staring back at them.