Thomas turned as he passed, his eyes riveted to the exhausted runner, unsure why this new development surprised him so much. Why wouldn't people go out and search the maze? Then he realized others were entering through the remaining three Glade openings, all of them running and looking as ragged as the guy who'd just whisked by him. There couldn't be much good about the maze if these guys came back looking so weary and worn.

He watched, curious, as they met at the big iron door of the small building; one of the boys turned the rusty wheel handle, grunting with the effort. Chuck had said something about runners earlier. What had they been doing out there?

The big door finally popped open, and with a deafening squeal of metal against metal, the boys swung it wide. They disappeared inside, pulling it shut behind them with a loud clonk. Thomas stared, his mind churning to come up with any possible explanation for what he'd just witnessed. Nothing developed, but something about that creepy old building gave him goose bumps, a disquieting chill.

Someone tugged on his sleeve, breaking him from his thoughts; Chuck had come back.

Before Thomas had a chance to think, questions were rushing out of his mouth. "Who are those guys and what were they doing? What's in that building?" He wheeled around and pointed out the East Door. "And why do you live inside a freaking maze?" He felt a rattling pressure of uncertainty, making his head splinter with pain.

"I'm not saying another word," Chuck replied, a new authority filling his voice. "I think you should get to bed early—you'll need your sleep. Ah"—he stopped, held up a finger, pricking up his right ear— "it's about to happen."

"What?" Thomas asked, thinking it kind of strange that Chuck was suddenly acting like an adult instead of the little kid desperate for a friend he'd been only moments earlier.

A loud boom exploded through the air, making Thomas jump. It was followed by a horrible crunching, grinding sound. He stumbled backward, fell to the ground. It felt as if the whole earth shook; he looked around, panicked. The walls were closing. The walls were really closing—trapping him inside the Glade. An onrushing sense of claustrophobia stifled him, compressed his lungs, as if water filled their cavities.

"Calm down, Greenie," Chuck yelled over the noise. "It's just the walls!"

Thomas barely heard him, too fascinated, too shaken by the closing of the Doors. He scrambled to his feet and took a few trembling steps back for a better view, finding it hard to believe what his eyes were seeing.

The enormous stone wall to the right of them seemed to defy every known law of physics as it slid along the ground, throwing sparks and dust as it moved, rock against rock. The crunching sound rattled his bones. Thomas realized that only that wall was moving, heading for its neighbor to the left, ready to seal shut with its protruding rods slipping into the drilled holes across from it. He looked around at the other openings. It felt like his head was spinning faster than his body, and his stomach flipped over with the dizziness. On all four sides of the Glade, only the right walls were moving, toward the left, closing the gap of the Doors.

Impossible, he thought. How can they do that? He fought the urge to run out there, slip past the moving slabs of rock before they shut, flee the Glade. Common sense won out—the maze held even more unknowns than his situation inside.

He tried to picture in his mind how the structure of it all worked. Massive stone walls, hundreds of feet high, moving like sliding glass doors—an image from his past life that flashed through his thoughts. He tried to grasp the memory, hold on to it, complete the picture with faces, names, a place, but it faded into obscurity. A pang of sadness pricked through his other swirling emotions.

He watched as the right wall reached the end of its journey, its connecting rods finding their mark and entering without a glitch. An echoing boom rumbled across the Glade as all four Doors sealed shut for the night. Thomas felt one final moment of trepidation, a quick slice of fear through his body, and then it vanished.

A surprising sense of calm eased his nerves; he let out a long sigh of relief. "Wow," he said, feeling dumb at such a monumental understatement.

"Ain't nothin', as Alby would say," Chuck murmured. "You kind of get used to it after a while."

Thomas looked around one more time, the feel of the place completely different now that all the walls were solid with no way out. He tried to imagine the purpose of such a thing, and he didn't know which guess was worse—that they were being sealed in or that they were being protected from something out there. The thought ended his brief moment of calm, stirring in his mind a million possibilities of what might live in the maze outside, all of them terrifying. Fear gripped him once again.

"Come on" Chuck said, pulling at Thomas's sleeve a second time. "Trust me, when nighttime strikes, you want to be in bed"

Thomas knew he had no other choice. He did his best to suppress everything he was feeling and followed.

CHAPTER 5

They ended up near the back of the Homestead—that was what Chuck called the leaning structure of wood and windows—in a dark shadow between the building and the stone wall behind it.

"Where are we going?" Thomas asked, still feeling the weight of seeing those walls close, thinking about the maze, the confusion, the fear. He told himself to stop or he'd drive himself crazy. Trying to grasp a sense of normalcy, he made a weak attempt at a joke. "If you're looking for a goodnight kiss, forget it."

Chuck didn't miss a beat. "Just shut up and stay close."

Thomas let out a big breath and shrugged before following the younger boy along the back of the building. They tiptoed until they came upon a small, dusty window, a soft beam of light shining through onto the stone and ivy. Thomas heard someone moving around inside.

"The bathroom," Chuck whispered. "So?" A thread of unease stitched along Thomas's skin. "I love doing this to people. Gives me great pleasure before bedtime."

"Doing what?" Something told Thomas Chuck was up to no good. "Maybe I should—"

"Just shut your mouth and watch." Chuck quietly stepped up onto a big wooden box that sat right under the window. He crouched so that his head was positioned just below where the person on the inside would be able to see him. Then he reached up with his hand and lightly lapped on the glass.

"This is stupid," Thomas whispered. There couldn't possibly be a worse time to play a joke—Newt or Alby could be in there. "I don't wanna get in trouble—I just got here!"

Chuck suppressed a laugh by putting his hand over his mouth. Ignoring Thomas, he reached up and tapped the window again.

A shadow crossed the light; then the window slid open. Thomas jumped to hide, pressing himself against the back of the building as hard as he could. He just couldn't believe he'd been suckered into playing a practical joke on somebody. The angle of vision from the window protected him for the moment, but he knew he and Chuck would be seen if whoever was in there pushed his head outside to get a better look.

"Who's that!" yelled the boy from the bathroom, his voice scratchy and laced with anger. Thomas had to hold in a gasp when he realized it was Gally—he knew that voice already.