Ender's Game (Ender Wiggins Saga)

than just switching from one to the next," he said. "For instance, why is there gravity in the corridor outside the room, just before we go in?”
      Petra closed her eyes. "And if the battlerooms are really free-floating, what happens when one is connected? Why doesn't it start to move with the rotation of the school?”
      Ender nodded.
      "These are the mysteries," Petra said in a deep whisper. "Do not pry into them. Terrible things happened to the last soldier who tried. He was discovered hanging by his feet from the ceiling of the bathroom, with his head stuffed in the toilet.”
      "So I'm not the first person to ask the question.”
      "You remember this, little boy." When she said little boy it sounded friendly, not contemptuous. "They never tell you any more truth than they have to. But any kid with brains knows that there've been some changes in science since the days of old Mazer Rackham and the Victorious Fleet. Obviously we can now control gravity. Turn it on and off, change the direction, maybe reflect it-- I've thought of lots of neat things you could do with gravity weapons and gravity drives on starships. And think how starships could move near planets. Maybe tear big chunks out of them by reflecting the planet's own gravity back on itself, only from another direction, and focused down to a smaller point. But they say nothing.”
      Ender understood more than she said. Manipulation of gravity was one thing; deception by the officers was another; but the most important message was this: the adults are the enemy, not the other armies. They do not tell us the truth.
      "Come, little boy," she said. "The battleroom is ready. Petra's hands are steady. The enemy is deadly." She giggled. "Petra the poet, they call me.”
      "They also say you're crazy as a loon.”
      "Better believe it, baby butt." She had ten target balls in a bag. Ender held onto her suit with one hand and the wall with the other, to steady her as she threw them, hard, in different directions. In the null gravity, they bounced every which way. "Let go of me," she said. She shoved off, spinning deliberately; with a few deft hand moves she steadied herself, and began aiming carefully at ball after ball. When she shot one, its glow changed from white to red. Ender knew that the color change lasted less than two minutes. Only one ball had changed back to white when she got the last one.
      She rebounded accurately from a wall and came at high speed back to Ender. He caught her and held her against her own rebound, one of the first techniques they had taught him as a Launchy.
      "You're good," he said.
      "None better. And you're going to learn how to do it.”
      Petra taught him to hold his arm straight, to aim with the whole arm. "Something most soldiers don't realize is that the farther away your target is, the longer you have to hold the beam within about a two-centimeter circle. It's the difference between a tenth of a second and a half a second, but in battle that's a long time. A lot of soldiers think they missed when they were right on target, but they moved away too fast. So you can't use your gun like a sword, swish swish slice-em-in-half. You got to aim.”
      She used the ballcaller to bring the targets back, then launched them slowly, one by one. Ender fired at them. He missed every one.
      "Good," she said. "You don't have any bad habits.”
      "I don't have any good ones, either," he pointed out.
      "I give you those.”
      They didn't accomplish much that first morning. Mostly talk. How to think while you were aiming. You've got to hold your own motion and your enemy's motion in your mind at the same time. You've got to hold your arm straight out and aim with your body, so in case your arm is frozen you can still shoot. Learn where your trigger actually fires and ride the edge, so you don't have to pull so far each time you fire. Relax your body, don't tense up; it makes you tremble.
      It was the only practice Ender got that day. During the army's drills in the afternoon, Ender was ordered to bring his desk and do his schoolwork, sitting in a corner of the room. Bonzo had to have all his soldiers in the battleroom, but he didn't have to use them.
      Ender did not do his schoolwork, however. If he couldn't have drill as a soldier, he could study Bonzo as a tactician. Salamander Army was divided into the standard four toons of ten soldiers each. Some commanders set up their toons so that A toon consisted of