Empire of the Sun is a 1984 novel by J. G. Ballard which was awarded the James Tait Black Memorial Prize. Like Ballard's earlier short story, "The Dead Time" (published in the anthology Myths of the Near Future), it is essentially fiction but draws extensively on Ballard's experiences in World War II. The novel tells the story of Jamie "Jim" Graham, a young boy who goes from living in a wealthy British family in Shanghai, to becoming a prisoner of war in Lunghua Civilian Assembly Center, a Japanese internment camp, during World War II.
The book was adapted by Tom Stoppard in 1987. The screenplay was filmed by Steven Spielberg, to critical acclaim, being nominated for six Oscars and winning three British Academy Awards (for cinematography, music and sound). It starred 13-year-old Christian Bale, as well as John Malkovich and Miranda Richardson.
For information on the movie adaptation, see here: Empire of the Sun.