User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-5774152-20130314045212/@comment-3146930-20130316154907

I normally re-read them any time I feel like my knowledge of the series is slipping. Sometimes when re-reading them, I discover something new. I'll also normally re-read the series any time a new book in that series is being released, so I read the PJO series over again when The Lost Hero was about to some out. Read TLH again when SoN was about to some out, read TLH and SoN when MoA was about to some out, and of course when the new book comes out, I read it twice.