"I was the source of the disease. I was isolating him, and it worked."

"Give him time. To see what he does with it."

"We don't have time."

"We don't have time to rush a kid ahead who has as much chance of being a monster as a military genius."

"Is this an order?"

"The recorders on, it's always on, your a.s.s is covered, go to h.e.l.l."

"If it's an order, then I'll--"

"It's an order. Hold him where he is until we see now he handles things in his launch group. Graff, you give me ulcers."

"You wouldn't have ulcers if you'd leave the school to me and take care of the fleet yourself."

"The fleet is looking for a battle commander. There's nothing to take care of until you get me that."

They filed clumsily into the battleroom, like children in a swimming pool for the first time, clinging to the handholds along the side. Null gravity was frightening, disorienting; they soon found that things went better if they didn't use their feet at all.

Worse, the suits were confining. It was harder to make precise movements, since the suits bent just a bit slower, resisted a bit more than any clothing they had ever worn before.

Ender gripped the handhold and flexed his knees. He noticed that along with the sluggishness, the suit had an amplifying effect on movement. It was hard to get them started, but the suit's legs kept moving, and strongly, after his muscles had stopped. Give them a push this strong, and the suit pushes with twice the force. I'll be clumsy for a while. Better get started.

So, still grasping the handhold, he pushed off strongly with his feet.

Instantly he flipped around, his feet flying over his head, and landed fiat on his back against the wall. The rebound was stronger, it seemed, and his hands tore loose from the handhold. He flew across the battleroom, tumbling over and over.

For a sickening moment he tried to retain his old up-and-down orientation, his body attempting to right itself, searching for the gravity that wasn't there. Then he forced himself to change his view. He was hurtling toward a wall. That was down. And at once he had control of himself. He wasn't flying, he was falling. This was a dive. He could choose how he would hit the surface.

I'm going too fast to catch ahold and stay, but I can soften the impact, can fly off at an angle if I roll when I hit and use my feet--

It didn't work at all the way he had planned. He went off at an angle, but it was not the one he had predicted. Nor did he have time to consider. He hit another wall, this time too soon to have prepared for it. But quite accidentally he discovered a way to use his feet to control the rebound angle. Now he was soaring across the room again, toward the other boys who still clung to the wall. This time he had slowed enough to be able to grip a rung. He was at a crazy angle in relation to the other boys, but once again his orientation had changed, and as far as he could tell, they were all lying on the floor, not hanging on a wall, and he was no more upside down than they were.

"What are you trying to do, kill yourself?" asked Shen.

"Try it," Ender said. "The suit keeps you from hurting yourself, and you can control your bouncing with your legs, like this." He approximated the movement he had made.

Shen shook his head-- he wasn't trying any fool stunt like that. But one boy did take off, not as fast as Ender had, because he didn't begin with a flip, but fast enough. Ender didn't even have to see his face to know that it was Bernard. And right after him, Bernard's best friend, Alai.

Ender watched them cross the huge room, Bernard struggling to orient himself to the direction he thought of as the floor, Alai surrendering to the movement and preparing to rebound from the wall. No wonder Bernard broke his arm in the shuttle, Ender thought. He tightens up when he's flying. He panics. Ender stored the information away for future reference.

And another bit of information, too. Alai did not push off in the same direction as Bernard. He aimed for a corner of the room. Their paths diverged more and more as they flew, and where Bernard made a clumsy, crunching landing and bounce on his wall, Alai did a glancing triple bounce on three surfaces near the corner that left him most of his speed and sent him flying off at a surprising angle. Alai shouted and whooped, and so did the boys watching him. Some of them forgot they were weightless and let go of the wall to clap their hands. Now they drifted lazily in many directions, waving their arms, trying to swim.

Now, that's a problem, thought Ender. What if you catch yourself drifting? There's no way to push off.

He was tempted to set himself adrift and try to solve the problem by trial and error. But he could see the others, their useless efforts at control, and he couldn't think of what he would do that they weren't already doing.

Holding onto the floor with one hand, he fiddled idly with the toy gun that was attached to his suit in front, just below the shoulder. Then he remembered the hand rockets sometimes used by marines when they did a boarding a.s.sault on an enemy station. He pulled the gun from his suit and examined it. He had pushed all the b.u.t.tons back in the room, but the gun did nothing there. Maybe here in the battleroom it would work. There were no instructions on it. No labels on the controls. The trigger was obvious-- he had had toy guns, as all children had, almost since infancy. There were two b.u.t.tons that his thumb could easily reach, and several others along the bottom of the shaft that were almost inaccessible without using two hands. Obviously, the two b.u.t.tons near his thumb were meant to be instantly usable.

He aimed the gun at the floor and pulled back on the trigger. He felt the gun grow instantly warm; when he let go of the trigger, it cooled at once. Also, a tiny circle of light appeared on the floor where he was aiming.

He thumbed the red b.u.t.ton at the top of the gun, and pulled the trigger again. Same thing.

Then he pushed the white b.u.t.ton. It gave a bright flash of light that illuminated a wide area, but not as intensely. The gun was quite cold when the b.u.t.ton was pressed.

The red b.u.t.ton makes it like a laser-- but it is not a laser, Dap had said-- while the white b.u.t.ton makes it a lamp. Neither will be much help when it comes to maneuvering.

So everything depends on how you push off, the course you set when you start. It means we're going to have to get very good at controlling our launches and rebounds or we're all going to end up floating around in the middle of nowhere. Ender looked around the room. A few of the boys were drifting close to walls now, flailing their arms to catch a handhold. Most were b.u.mping into each other and laughing; some were holding hands and going around in circles. Only a few, like Ender, were calmly holding onto the walls and watching.

One of them, he saw, was Alai. He had ended up on another wall not too far from Ender. On impulse, Ender pushed off and moved quickly toward Alai. Once in the air, he wondered what he would say. Alai was Bernard's friend. What did Ender have to say to him?

Still, there was no changing course now. So he watched straight ahead, and practiced making tiny leg and hand movements to control which way he was facing as he drifted. Too late, he realized that he had aimed too well. He was not going to land near Alai-- he was going to hit him.

"Here, snag my hand!" Alai called.

Ender held out his hand. Alai took the shock of impact and helped Ender make a fairly gentle landing against the wall.

"That's good," Ender said. "We ought to practice that kind of thing."

"That's what I thought, only everybody's turning to b.u.t.ter out there," Alai said. "What happens if we get out there together? We should be able to shove each other in opposite directions."

"Yeah."

"OK?"

It was an admission that all might not be right between them. Is it OK for us to do something together? Ender's answer was to take Alai by the wrist and get ready to push off.

"Ready?" said Alai. "Go."

Since they pushed off with different amounts of force, they began to circle each other. Ender made some small hand movements, then shifted a leg. They slowed. He did it again. They stopped orbiting. Now they were drifting evenly.

"Packed head, Ender." Alai said. It was high praise. "Let's push off before we run into that bunch."

"And then let's meet over in that corner." Ender did not want this bridge into the enemy camp to fail.

"Last one there saves farts in a milk bottle," Alai said.

Then, slowly, steadily, they maneuvered until they faced each other, spread-eagled, hand to hand, knee to knee.

"And then we just scrunch?" asked Alai.

"I've never done this before either," said Ender.

They pushed off. It propelled them faster than they expected. Ender ran into a couple of boys and ended up on a wall that he hadn't expected. It took him a moment to reorient and find the corner where he and Alai were to meet. Alai was already headed toward it. Ender plotted a course that would include two rebounds, to avoid the largest cl.u.s.ters of boys.

When Ender reached the corner, Alai had hooked his arms through two adjacent handholds and was pretending to doze.