在沙滩上 is 上 e of several post-apocalyptic novels that came out in the wake of the Holocaust and the bombings of Hiroshima and Nagasaki, during a time when the Cold War between the United States and the Soviet Union was reaching fever pitch.
Atmospherically, 在沙滩上 is a noir novel. It may be set in sunny Melbourne, but a sense of foreboding fills all cracks and facets. It is also an existentialist novel. It explores the individual reacting to a world where god is dead, and all meaning is absent save the meaning we make ourselves.