Welcome to Room 13 at Willow Creek Elementary—where fun is forbidden, smiling earns demerits, and silence isn’t golden... it’s mandatory. When the towering, pale, and terrifying Mr. Bones replaces their kind fifth-grade teacher, the students of Room 13 are thrust into a world of bizarre rules, confiscated treasures, and daily fear. He’s more skeleton than man, more menace than mentor—and no one seems to notice but the kids themselves. But one brave student, Jessica Chen, decides enough is enough. Together with her friends, she launches Operation Bones—a secret rebellion to uncover who (or what) their teacher really is. What they find will shake the entire school... and reveal a haunting truth that even Mr. Bones can’t hide forever. Darkly funny, deeply heartfelt, and filled with mystery, The Incredibly Thin, Tall, Extremely Horrible Mr. Bones is a gothic-inspired classroom adventure about fear, friendship, and the power of standing up—no matter how small you are, or how tall the problem.