Tick read through the poem again, feeling very uneasy. Paul and Sofia were right—this was getting weird. Even though Master George had sent the Gnat Rat and the Tingle Wraith after them during their initial recruiting test, this seemed too sinister for the jolly old man. It felt dark and threatening.

“This isn’t even a riddle,” Tick said, standing up.

“What do you mean?” Sofia asked.

Tick pointed down the long tunnel in the direction from which he thought the train thing had come the first time they’d seen it blur past. “There’s nothing to solve. We have to stand inside this square no matter what happens. No matter what . . . comes.”

He couldn’t get over the sick feeling in his gut. Something felt wrong, like he’d left a fat wallet full of money on a city park bench. Or probably how his mom would feel if she realized she’d left the oven on, right after taking off in the airplane to go visit Grandma. The world seemed twisted, off balance.

After a long pause, Sofia spoke up in a confident voice. “It doesn’t matter.”

“What doesn’t matter?” Tick and Paul said at the same time.

Sofia shrugged. “If it’s Master George—which I doubt—we need to do what the poem says. If it’s not him, we still need to do what it says. We’ll be really tempted to leave the square, but we can’t. Then, at the last second, whoever it is will wink us away. Poof, nice and easy—just like the chair thing.”

“How do we know for sure we’ll get winked?” Tick asked, even though the answer had just clicked in his head.

“If somebody else is doing this,” Sofia said, “they could obviously just kill us if they wanted to. Why would they go through this whole ordeal to get rid of us? If anything, now we have even more pressure to pass these tests.” She shook her fists and screamed in frustration. “This is so stupid! Stupid, stupid, stupid!”

“Way to sum it up intelligently,” Paul muttered. When she gave him a cold stare, he threw his hands up. “Hey, I agree with you!”

“Wait,” Tick said, shushing them, holding a hand out. He felt a slight tremor beneath his feet, a small vibration with no sound.

“It’s coming, dude,” Paul said. “It’s coming!”

The shaking grew stronger, almost visible now; Paul and Sofia seemed to jiggle up and down. Tick had never been in an earthquake, but he knew this must be what it felt like.

“What do we do, man, what do we do?” Paul was looking left and right as if trying to decide which direction to run.

Sofia reached out and grabbed Paul by the shirt, jerking him toward her until their faces were only inches apart. “We stand in this square, Rogers, you hear me? We stand in this square!”

At once, they all looked down at their feet. Tick had to shuffle a foot closer to the others to be inside the red-lined boundary.

“She’s right,” he said as Sofia let go of Paul. “No matter what, we have to stay in the square.”

The tunnel trembled violently; Tick had to spread his feet a little and hold out his arms to maintain his balance. A sound grew in the distance, a low rumble of thunder. Whatever it was—the poem had called it a beast—was coming from the direction Tick had thought it would. He narrowed his eyes and stared that way, though nothing had appeared yet in the distance.

“This is crazy, man,” Paul said. “Are you guys sure about this?”

“Yes,” Tick said, not breaking his concentration. He thought he could see something dark, far down the tunnel.

“My brain wants me to run,” Paul insisted.

This time, Tick did turn, pointing at the poem still printed on the ground. “The message said we’d think that. Don’t move.” He looked back down the tunnel. There was definitely something dark way down there, growing larger, bit by bit.

“I’m watching you, Rogers,” Sofia said, almost shouting as the rumbling and shaking increased. “We’re going to wink away. No one’s going to kill us!”

“Fine! Quit treating me like a baby.”

Tick strained his eyes as the dark shape grew bigger. Something about its movement made him think it was twisting—corkscrewing through the tunnel like a roller coaster.

“What is that thing?” he said, though the roar had grown so loud he knew no one could hear him. He braced himself, knowing it would be easier if he didn’t look, didn’t see it coming. But his curiosity was too strong.

Then the air around them suddenly brightened, flashing a blinding white.

“Look!” Paul shouted from behind him.

Tick turned to see sand dunes and sunlight through a gaping hole in the side of the tunnel.

The door had opened.

Chapter

19

The Train Thing

A shot of elation and relief surged through Tick’s nerves, like he’d been rescued from a burning building. There it was, their escape! He even took a step toward it before reason pulled his thoughts back to reality. Sofia grabbed his arm.

“No!” she screamed.

“I know!” he answered, looking down at his feet. His toes were within inches of the red line. The world around them shook and roared, as if they were in a small building pummeled by a tornado. The wind had picked up, rustling their hair and clothes.

Paul stared at the open door, his eyes glazed over.

“Don’t even think about it!” Sofia shouted at him. “No matter what, remember? If we run, we die!”

Paul snapped out of his daze, looked at Tick. “Dude, it’s right there!”

“Whoever it is, they’re just tempting us!” Tick yelled.

He moved as close to Paul as he could, then pulled Sofia in. “Link arms!” He could barely hear his own voice.

Sofia obeyed immediately, but Paul hesitated, the wind ripping at his shirt.

“Do it!” Tick yelled.

Paul’s face sank into a frown as he wrapped his arm around Sofia’s elbow, then his other around Tick’s. All this time, the door remained open, staying open far longer than it ever had before. This was all planned out, Tick thought. But by who?

From the way they stood, only Sofia faced the onrushing nightmare, her face set in cold fear, eyes wide, mouth in a tight line. The air swirled around them, making them sway dangerously close to the line. Tick thought Sofia’s hair might simply fly off at any second. And the noise. The noise. Like screaming brakes and revved jet engines and pounding hammers and hissing steam—a chorus of terrible sounds that pierced Tick’s ears with sharp pain.