User blog comment:CardMaster2412/Seven Half Bloods Parent and Identities/@comment-4749854-20120111114414

SPOILER ALERT!! I think that Annabeth will be the seventh halfblood because, in The Son of Neptune Hera kind of hinted that it will be her. She said Annabeth will make problems for them and that she has a bigger role to play and plus the next book is called The Mark of Athena.