Jon and his co-authors find comedy in what sounds like a grim scenario: For some unknown reason, humans no longer live on Earth. The book's purpose is to help the aliens who will someday visit Earth understand its former occupants. Earth (The Book) skewers the entire human experience from reproduction and marriage to commerce and religion.
Jon says that while Earth (The Book)'s sense of humor is similar to The Daily Show's, the process of writing it felt different. "The show ... can feel very ephemeral," he says. "You work really, really hard every day to put it out there, and some days you're successful with it and some days you're not. That can be forgiving as a process, ... but there's not much time to savor anything either."