Zia loved the old library in her town. One rainy day, she sat near a tall window and read a book about stars. She learned that groups of stars are called constellations. Constellations are pictures in the sky, like a big bear or a hunter. Zia looked around the quiet room. She saw small things that other people did not see. She saw a pencil on the floor and a small mark on the wall.
Zia walked to the history room. She saw dusty footprints on the floor. The footprints were small and light. They went past a bookshelf and stopped in the middle of the room. There was no door there. There was no window there. Zia felt a strange, paralytic feeling. A paralytic feeling makes your body go stiff and still. She could not move for a moment. She could not understand the mystery. She wanted to find the answer.