Harry Potter and the Gyrating Book Sales

What A Difference The Harry Makes: Sales of children’s books rose last year at a rate that disappointed the industry, according to a report released in June by the Book Industry Study Group, a publishing trade association. Sales revenue for hardcover books, the format in which new books typically reach the market, increased just 2.5 percent over the previous year, compared with the more usual 5 percent to 6 percent. And by some measures units sold, for example hardcover sales were almost flat. By contrast, hardcover sales revenue rose nearly 10 percent in 2005, from 2004. The difference was that “Harry Potter and the Half-Blood Prince,” the sixth book in J. K. Rowling’s series, came out in 2005, as did “Harry Potter and the Goblet of Fire,” the fourth movie.