Reddit reviews Losing Faith in Faith: From Preacher to Atheist

Why don't you try Dan Barker's book? "Losing Faith in Faith" He was a Preacher and became an atheist through time. Great story.

There is also "Why I Became an Atheist: A Former Preacher Rejects Christianity"

Oh, I almost forgot William Lobdell. He covered religion for the LA Times for years but after reporting so much on religion he became an atheist. Here's his site and here's his book "Losing My Religion: How I Lost My Faith Reporting on Religion in America and Found Unexpected Peace"

Good luck!

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Losing Faith in Faith: From Preacher to Atheist by Dan Barker

edit: or Atheism: A Philosophical Justification by Michael Martin

The shortness helps.

A small pill, while having the same affect as a horse suppository, might at least be considered.

Also try "Losing Faith in Faith" for a really gentle introduction to godlessness.

Losing faith in Faith. From pastor to atheist. You want to start with someone who is kind to and sensitive toward the theist position, not someone who will put her into a defensive posture.

An even better start might be letting go of god by Julia Sweeney. She doesn't have to commit to a book and Julia's presentation is smooth, funny, and really kind.

After those, if she can have a real discussion about science without feeling personally threatened, I'd have her read or listen to the demon haunted world by Carl Sagan. It's wonderfully accessible to the layman, covers the basics of the scientific mindset and reasoning, and is not specifically tarted against religion.

Good luck to you and remember: this stuff Isn't worth causing a lot of family strife over. so spend at least as much time working on how to have a conversation that everyone wants to participat in as you do in researching your arguments.

Also... Gnostic atheist? To that means you know for sure that there is no god at all. Is that what you mean?