[Stats] Atheist Books Overtaking Christian Titles in Best-Sellers Lists

"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."

[...]

Coincidently alongside the sag in sales of religious books has been a rapid interest in atheist books over the past months. Books that had not sold that well in the past are now beginning to turn into purchases."

Humaniststudies.org, June 6, 2007