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Mystery Behind the Wall (The Boxcar Children Mysteries #17)

Name: Mystery Behind the Wall (The Boxcar Children Mysteries #17)
Author: Gertrude Chandler Warner
ISBN: 9780807553640

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Book Details

ISBN / ASIN0807553646

ISBN-139780807553640

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The Aldens find a mystery when a visitor comes. Who put the coins in a hiding place behind the wall?