A California pastor has gained attention after he tweeted a photo of a Bible that was labeled "fiction" at his local Costco.

Costco has Bibles for sale under the genre of FICTION Hmmmm…… pic.twitter.com/mLZVogkSfd

- Caleb Kaltenbach (@calebwilds) November 15, 2013

Caleb Kaltenbach, lead pastor at the nondenominational Discovery Church in Simi Valley, said he was shocked to find the holy book had been relegated to the fiction section, and would presumably share the shelves with the likes of "Fifty Shades of Grey" and John Grisham novels.

"I never, ever in my entire life had seen a Bible labeled as fiction," Kaltenbach told ABCNews.com. "I just took the picture. I think really what has been revealed is a larger conversation over faith. There are people who are passionate about their faith in Christ and passionate against it."

Costco said in a statement to ABCNews.com that a "small percentage of the Bibles" were mislabeled by the distributor.

"However, we take responsibility and should have caught the mistake," the statement read. "We are correcting this with them for future distribution. In addition, we are immediately relabeling all mislabeled Bibles."

The pastor said he doesn't hold the mistake against the mega store, which is known for selling everything from diamond rings to jars of peanut butter the size of a human head.

"I love Costco," he said. "I still plan to shop there a lot."