The truth in a novel?

So, I'm minding my own business, doing some summer reading and I come across this exchange:

Was Mr. Naumann a Christian man?"

"Christian? Yes, he was. At least, he was an Episcopalian. That may not be the same thing as a Christian."

That's on page 26 of The Echelon Vendetta by David Stone. I picked this one up at the library because it was on the Ian Fleming Steel Dagger Award list.

This is from page 31:

"He was an Episcopalian. They don't believe in God."

This is my first exposure to David Stone; I'm wondering how he knows so much about pecusa. Perhaps he just reads the newspaper.