The Hardy Boys have been called "a cultural touchstone all over the world". Their adventures have been continuously in print since 1927. The series was an instant success: bởi mid-1929 over 115,000 sách had been sold, and as of 2008 the sách were selling over a million copies a year(the first Hardy Boys book, The Tower Treasure, alone sells over 100,000 copies a year). Worldwide, over 70 million copies of Hardy sách have been sold. A number of critics have tried to explain the reasons for the characters' longevity.
One explanation for this continuing popularity is that the Hardy Boys are simple...
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