User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-5562903-20121005194150/@comment-5562903-20121007175154

^The way I see it, each of the 7 had a quest before they were confirmed to be part of the prophecy. RR said that MoA was Annabeth's book. Myabe Annabeth's quest to confirm her place was her quest to follow The Mark of Athena, and find Athena Parthenos.

I stand by what I said earlier about a) my theories about the Doors of Death, b) no POV in Tartarus (maybe Piper's dagger visions every so often) and c) we won't know much more until the cover art and chapter 1