The Association of American Publishers (AAP), the national trade association of the U.S. book publishing industry, recently released its annual estimate of total book sales in the United States, and according to its findings, religious books had a “difficult year.”

The report, which reveals sales from 2006, marked a sharp 10.2 percent drop in religious books sales compared to the previous twelve months. The trend was one of the biggest decreases among all the book categories reported on by AAP.

According to AAP, the drop is not critical, however, since “compound growth is still strong at 7.5 percent per year.”

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