Sometimes the bestselling book of the year is a surprise—even those of us immersed in the book world can be left puzzled by the final numbers of what books moved the most copies. The bestselling books of previous decades can be even more surprising: some of the books that have endured the longest were not very successful in their time, and some of the top-selling books of that moment have been lost to history. Can you guess the novels that topped the charts through the last century?
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