Episode Description: Max and Molly suspect that Mr. Avogadro’s student book club may be a front for Mole recruitment. Using Math to calculate reading goals, averages, and even a new “Suspicion Number” system inspired by mathematician Paul Erdős, they try to narrow down suspects. But when they overhear Mr. A and Mr. Z talking about “burrows” and “alternate history,” the mystery deepens.

Math Concepts: Division with remainders; Multiplication to find daily/weekly totals;; Application of averages;Fractions/percentages; Graph theory-inspired reasoningHistory/Geography Concepts: Misconceptions about animals (bats and moles’ eyesight/echolocation); Introduction to mathematician Paul Erdős and the Erdős Number System; Literature reference: A Wrinkle in Time by Madeleine L’Engle