Occasionally, you see books written by Christian apologists on Amazon’s atheism section. It’s not a glitch. The category isn’t for books promoting atheism; it’s for books about atheism.
But I’ll admit I get annoyed when I see a book by Dinesh D’Souza or Ravi Zacharias in the same place I expect to find biting criticism of religion.
That’s why it puts a smile on my face to see what’s at the top of the Creationism section’s list of bestsellers:

Bill Nye‘s Undeniable: Evolution and the Science of Creation, a book that thoroughly debunks everything you’d find in Ken Ham‘s museum.
I guess that makes up for it 🙂