作者：S. E. Grove 字数：15.4万字 出版社：Penguin Young Readers Group

Then Shadrack is kidnapped. And Sophia, who has rarely been outside of Boston, is the only one who can search for him. Together with Theo, a refugee from the West, she travels over rough terrain and uncharted ocean, encounters pirates and traders, and relies on a combination of Shadrack maps, common sense, and her own slantwise powers of observation. But even as Sophia and Theo try to save Shadrack life, they are in danger of losing their own.

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