Amy and Christopher are twins AND international sleuths. Their eco-photographer parents travel often. So the twins fly to meet them.\u003cbr /\u003e \u003cbr /\u003eChristopher loves drawing. He draws people and places. And often he notices unusual clues.\u003cbr /\u003e \u003cbr /\u003eAmy reads and thinks quickly. She also collects coins, stamps, stickers, phone cards and clues.\u003cbr /\u003e \u003cbr /\u003eTogether they solve mysteries in the air and at international airports.
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