The Finches have a volcano in their cellar. Only three people know about it - Mr. Finch, his son Peter, and the realtor who reunited the house to them for one dollar. They know that they must keep this explosive secret to themselves. But how can they keep a volcano a secret? Won't people wonder why it never snows over Number Seven Pride Street? Peter's sister Patsy wonders why the door to the cellar is always locked. The neighbors wonder why the Finches haven't ordered oil all winter. Would they ever believe that the "furnace" in the cellar is a real live volcano?

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