I didn't laugh

Coworker: [excited] Did you see The Hunger Games?

Me: Yep.

Coworker: I don't usually watch movies in the theater, but might just for the sequel - I want to know what happens with Katniss and Peeta! Even though it doesn't really make sense that they're putting them back again.

Me: Um, have you read the books?

Coworker: There's books?