Jonathan Safran Foer's inspiration for his main character came when having difficulty with another project. In an interview, Foer stated, "I was working on another story and I just started to feel the drag of it. And so, as a side project, I got interested in the voice of this kid. I thought maybe it could be a story; maybe it would be nothing. I found myself spending more and more time on it and wanting to work on that".[3] On the challenges of writing a novel in a child's voice, Foer responded, "It's not the voice of a child exactly," adding that "in order to create this thing that feels most real, it's usually not by actually giving the most accurate presentation of it."[3]
Foer combined the character he had been developing with the 9/11-centered plot. He created the story line from his personal experiences and reactions regarding the terrorist attacks on 9/11. Foer was sleeping off jet lag after returning to New York City from a trip to Spain, when he was woken by a phone call from a friend: "He said, 'You have to turn on the TV, a plane has crashed into the World Trade Center.' And then he said, 'I think it's going to be a very strange day.'"[3] In another interview, Foer said, "I think it's a greater risk not to write about [9/11]. If you're in my position—a New Yorker who felt the event very deeply and a writer who wants to write about things he feels deeply about—I think it's risky to avoid what's right in front of you."
