Nostalgia: nos·tal·gia (no-stal-juh) noun
1. a bittersweet longing for things, persons, or situations of the past
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Percy Jackson, a two time Olympic hero, is over monsters and gods and wars. He tries to avoid being the hero, after all, he had already had his turn. But problems keep finding him, and he can't seem to get away. Chiron figures he could kill to harpies with one stone and send Percy off to a magical wizarding school. That way, Percy could save Harry Potter and catch a break. And at first, it works. Percy gets his rest, and he's feeling great. But then he gets restless and starts to feel useless for anything, and perhaps a little ... nostalgic of his old life