You know Atheists are winning when writers like Richard Dawkins, Sam Harris and Christopher Hitchens have parasitic fleas cashing in on their success.
After the success of Atheist books the religious have been quick to bring out their own books. But unlike Atheists books the religious are left, Like usual, Presenting no evidence for their own position (other than regurgitated fallacies that have been repeatedly kicked to death) and only seek to refute the opposing position, Much like they do with evolution.
This can mean one of two things.
Either Atheist books are seen as a significant threat and worthy of rebuttal or the anti-atheist authors are simply trying to make some money on the back of someone elses work.