“It’s freaky, dude,” Paul said. “I mean, if I decide to turn left instead of right up here, am I gonna create a nasty Reality where I get eaten alive by monster air? That ain’t right.”

“It’s weird that—”

Sofia never finished her sentence, cut off by a loud yelp in the woods to their right, followed by the sudden, rushing sound of crunching leaves and breaking twigs. Someone, or some thing, was running toward them through the trees.

Tick and the others froze, staring toward the sounds, which grew louder as the whatever-it-was came closer. Crick-crash, crick-crash. Another yelp, this time more of a short scream, echoed off the towering trunks and leafy canopy.

“What is that?” Paul asked.

“Maybe we shouldn’t stick around to find out,” Tick offered. Every nerve in his body had just lit up with warning flames.

Before anyone could respond, a man burst through a wall of thick foliage fronting two large trees, hurtling himself forward until he lost his balance and fell onto the steep slope that led up to the road. As soon as the skinny, dark-haired man hit the ground, he scrambled to his hands and feet and started clawing his way toward them. With growing dread, Tick stared at the stranger’s tattered clothes and bloody splotches on his shirt.

Just a few feet away, the man finally reached the road and stood up, lifting his head enough to be seen clearly for the first time. Disheveled, dirty hair framed an olive-skinned face covered with terrible scratches and terror alive in his eyes.

Tick sucked in a huge gulp of air, half-relieved and half-shocked.

It was Mr. Chu, his science teacher.

Chapter

6

~

Intense Pain

Mr. Chu!” Tick yelled, running forward to help his favorite teacher, who looked ready to collapse. Sofia moved to assist, both of them grabbing an arm of Mr. Chu and lowering him to the shoulder of the road. The poor man crumpled into a ball, great heaves of breath making his chest rise and fall as his eyes darted between Tick, Sofia, and Paul. A leather satchel was slung over Mr. Chu’s shoulders with a thin strap, its bulky, sharp-angled contents clanking when it hit the ground.

“What happened?” Tick asked, fighting the panic he felt. What if he’s dying? Did someone out there attack him? He couldn’t help but look up at the trees, which suddenly seemed dark and ominous.

“Atticus . . .” Mr. Chu said with a dry rasp.

Tick knelt on one knee, lowering his head until he was close to Mr. Chu’s face. “What happened to you, Mr. Chu?”

“Atticus . . . I barely escaped . . .” A racking cough exploded from his lungs, shaking his entire body.

“Escaped?” Tick repeated. “From what?”