Yes the new Harry Potter will be a big hit, but the real growth in publishing revenue is coming elsewhere:
In 2004, religious books represented 7 percent of all book sales, with $1.95 billion in net revenues. The book industry overall totaled $26.45 billion in net revenues, according to the Book Industry Study Group. Translated into consumer spending, readers spent $3.7 billion on religious books, a category that includes Christian books. That is an increase of nearly 285 percent from 1983. "It is the only book category where we’ve seen that kind of growth rate," Greco said.
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