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Cover illustration of “The Trading Puzzle”

Cover illustration of “The Three Superpowers of Money”

Cover illustration of “The Island of Giant Stones”

Cover illustration of “The Beautiful Glass Beads”

Cover illustration of “The Wampum Shells”

Cover illustration of “The Golden Champion”

Cover illustration of “The Greedy Emperor&#x27;s Coins”

Cover illustration of “The Paper Money Machine”

Cover illustration of “The Marshmallow Choice”

Cover illustration of “The Patient Fisherman”

Cover illustration of “The Magic Number Messengers”

Cover illustration of “The Star-Sticker Secret”

Cover illustration of “The Math Miners”

Cover illustration of “The Ultimate Super-Piggybank”

Cover illustration of “The Secret Mind-Vault”