"Extremely Loud & Incredibly Close" is a novel by Jonathan Safran Foer that follows a young boy named Oskar Schell as he navigates life after the tragic loss of his father in the September 11 attacks. Oskar embarks on a quest across New York City to find the lock that matches a mysterious key left behind by his father, hoping to uncover a deeper connection to him. The story is told through a mix of Oskar's perspective and the narratives of other characters, including his grandparents. The novel explores themes of grief, trauma, and the search for meaning in the aftermath of loss.