I read it in 1995 and it corrected some misapprehensions I had about atheism. My main motivation for reading it was my prof for intro to religion said he wasn't going to cover atheism because it's illogical, so I checked out the book so I could see for myself. If the had just said he wasn't covering atheism because it isn't a religion, my interest would not have been piqued. Besides the prof's 'logical' arguments against atheism and the logic course I was taking at the same time, George Smith's book was the biggest influence on helping me realize I'm an atheist.
I'm not anti-Christian. I'm anti-stupid.