User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-24023042-20130401015138/@comment-5774152-20130401020631

It says Leo wonders if the doors are sealed how Percy and Annabeth will escape....And, I think that Leo will have his time to shine in the 5th book and in The House of Hades, probably just more of the whole Leo/Hazel/Frank triangle.