What is the author's style in Extremely Loud and Incredibly Close by Jonathan Safran Foer?

Extremely Loud and Incredibly Close by Jonathan Foer seeks to capture the trauma of the terrorist bombing of the World Trade Center in New York City on 11 Sep. 2001. The primary narrator is a precocious nine-year old boy, Oskar Schell, whose existing emotional problems turn to obsession due to the event, whose second anniversary has just passed. Oskar is picked on in school as "weird," but does not care. He lives in a world of experiments, inventions, Internet research, and the astrophysics of Dr. Stephen Hawking. He loves the Beatles, because his late Dad, born in 1963 loves the Beatles and whistles their tunes.