User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-7594114-20130803181243/@comment-3146930-20130804135311

He once referred to it as the CHB series in response to a questioner who called it the CHB series. He has also referred to merchandise centered on HoO and PJO as Camp Half-Blood [insert item]. Like for example, he refers to Camp Jupiter and Camp Half-Blood t-shirts as Camp Half-Blood t-shirts.

However, when the cover of The Lost Hero was released, he said he didn't want to call it "being careful not to call it a “Percy Jackson series.” It’s a little bit more than that. I’m also not calling it a “Camp Half-Blood series,” because it’s a little bit more than that, too." However, this could just be a reference to the HoO, and not the series as a whole.