Jace Moreno hates detention.
But when a storage closet door opens to a concrete stairwell that definitely wasn't there yesterday, detention becomes the least of his problems.
Jace, Priya (who treats mysteries like homework), and El (who would like to retire immediately) follow a cold draft into the woods... and find a buried hatch with a keypad.
The screen flashes one word:
HOLD
Then things get worse.
At school, new posters appear that say COOPERATE. The principal starts smiling too wide. People stop blinking. And something that looks almost-human begins testing the hallways like it's shopping for a life to steal.
To stop the glitch wearing their principal's face, the kids will need rules, chalk marks, and a humming silver cube they do not understand. Also, a grumpy janitor who locks every door twice.
Fast chapters. Big cliffhangers. Creepy fun.
Perfect for readers ages 8-12 who like scary stories with brains.