Thanks to Thomas (9) from Plymouth, England for the nice letter! He also sent me the picture above showing him in his Camp Half-Blood T-shirt. Thomas asks if I have any hints about the fourth book. Well, Thomas, just for you, look up empousai from Greek mythology — the Ancient Greek version of vampires. That’s all I’ll say for now, but in a week or two, I will post a reading from Battle of the Labyrinth on my website. In the meantime, you are demigod of the week!