The Question and Answer section for The Lightning Thief is a great resource to ask questions, find answers, and discuss the novel.
Percy is not in possession of the lightening bolt in Chapter Nine. Are you sure you've cited the correct chapter number for your question?
In Chapter Six, we learn that Percy talks in his sleep. While he was sleeping, Annabeth heard him talking about his math teacher Mrs. Dodds.
The blond girl thinks that Percy is aware of what was stolen and what was going to happen at the summer solstice.