Book Sales figures were (dont know if this is still the case) done by surveying a select few book sellers and extrapolating the results. The publicity people for publishers game the system by "loading" sales in these outlets. Nonfiction is a very small part of sales, compared to fiction. This is why Diet books are always on the list.
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'Tis better to remain silent and be thought a fool, than open one's mouth and remove all doubt.
Samuel Johnson (1709 - 1784)
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