User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-23784532-20131001151754/@comment-5423251-20131001173151

Actually,  by what i have seen, and this is not a spoiler(When are messages and apologies writen by the author on the book a spoiler?) Rick Riordan apolegised his fans because of the cliffhanger of his last book. Take your conclusions