An allegory from this book, is don't believe everything people tell you. Throughout this book people are constantly pretending to be good guys to gain Percy's trust but their real intentions are far from friendly. For example Ms.Dodds pretends to be a math teacher at Percy's school, but he finds out shes not a normal math teacher when she transforms into a monster and tries to kill him. Percy also recieves some gifts that seem to be very gracious gifts, but he finds out that not everything is as it seems. You will be dissapointed when Percy is fooled by some of these people, but it makes for a very interesting story.