User blog comment:Luna-daughter of Artemis/THE SON OF NEPTUNE BY RICK RIORDAN/@comment-3545478-20110616014115/@comment-3146930-20110616015119

From what I got from the preview and some speculation, Percy has been without his memories for two months. He woke up at the Wolf House (most likely a few days before Hera was captured) and met Lupa who went him on a quest to find the Roman Camp Half-Blood. It is at this time that we meet up with him and he is almost at the entrance to the camp. The book itself will work much like The Lost Hero with the POV switching between Percy, Hazel, and Frank.