Solution Book Level M: Kumon

To most people, the Kumon Solution Book Level M was just a slim, gray volume. Its spine was reinforced with brittle clear tape, and the words "Answer Book" were written in fading Sharpie across the cover. Inside were solutions to deceptively simple problems: systems of equations, complex factorization, and the first menacing curves of calculus.

“You looked,” the man whispered. His voice sounded like a pencil snapping. “You cheated.” Kumon Solution Book Level M

A second line appeared: Quantify the fear. To most people, the Kumon Solution Book Level