Compared to the same period last year, April's sales for religious books—in all print and digital formats—increased 2.5% to $48.5 million, following a 27.4% jump to $63.5 million in March sales and a 5.5% increase to $48.5 million in February sales. In April 2010, religious books sales totaled $46.6 million.

The biggest growth in the AAP report, however, was e-book sales, which continued to rise in April—reflecting an increase of 157.5% to $72.8 million, compared to April 2010, when sales were $28.3 million.

Based on data from 92 publishers, the categories of e-books, downloaded audiobooks and religious books saw revenue gains in April this year compared to April 2010, according AAP.

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