User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-5929284-20130201093606/@comment-5774152-20130203183453

Well since the cliffhangars have pretty much gotten bigger each book i'm sure Rick will figure something out. I don't have any idea what the cliffhangar would be, proabably the last thing we could think of since nobody suspected Annabeth and Percy to fall down to Tartarus. At least I didn't anyway:(