We all know that some names and some subjects simply sell books.The biographies of popular presidential candidates leap from the shelves as they appear in the long political"pre-season"before next year's election.When John Grisham writes,people buy.The reverse can also be true.Certain words can cut the sales of a book.Have you ever read a popular book on science that included differential equation in the title? As those of you know who have searched Amazon or your local bookstore,the words"chemical engineering"do not appear in the titles of books on the popular science shelves.The 24 books amazon.com lists from the search string"chemical engineering"includes only handbooks and textbooks - not one mystery,history,fantasy,play or tell-all biography.
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