User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-69.165.146.200-20130325145208

On June 18th The Son of Sobek e-single will also have a sneak peak chapter for The House of Hades. The preview will be released for free a little after that.

http://rickriordan.blogspot.ca/2013/03/upcoming-release-dates.html