How should I convert my Christian sister to an Atheist?

My sister is a pretty intelligent person-- she's attending a University for aerospace engineering, so she has a high education in math and sciences. However, our family was raised to be Christian, the American protestant kind that believes in a literal interpretation of the bible. As she grew older her disinterest... show more My sister is a pretty intelligent person-- she's attending a University for aerospace engineering, so she has a high education in math and sciences. However, our family was raised to be Christian, the American protestant kind that believes in a literal interpretation of the bible. As she grew older her disinterest in religion gradually decreased while her aspirations to be an engineer grew. I think that with a mind of science like that she will be able to see reason. I was wondering if I should just talk to her about it, or give her a book like "The God Delusion", or what? What do you think?
51 answers 51