Is that a Christian book?

While on our way to send our classmate off at Changi airport, both Edmund (a Wesleyan) and I (a Presbyterian) brought a book along to read.

While in the cab, Edmund saw the book I was holding. It was this:



Edmund asked:
"Is that a Christian book? It doesn't seem like a Christian book."

I replied:
"Ya, it's not a Christian book. It's a sociological study on ethnicity."

Then I pointed my finger to Edmund's book and asked:
"Is that a Christian book? It doesn't seem Christian."

Edmund held up his belt buckle and said:
"Do you want this to go into your mouth?"

The book in Edmund's hand was: