One additional book:
The Magic of reality by RIchard Dawkins. I bought it for my 6 year old and it is still a bit advanced, I would imagine it would work really well for a 9 or 10 year old.
I really enjoyed reading it too!
Great book! I also purchased the book for my six year old boy and the audio, so he can follow along. It’s such a pleasant listen, Richard and his wife did an excellent job. I do agree that it might be more suitable for older children.
Parenting Beyond Belief, compiled by McGowan, was a great read, with many different points of view on how to deal with a number of situations like the death of a loved one, the pledge in school, the boy scouts, and explaining to your child why all of his or her friends are religious. I would recommend it.