Hunger by Knut Hamsun is a psychological novel that follows an unnamed writer wandering the streets of Kristiania (now Oslo), struggling with extreme poverty, starvation, and mental deterioration.

As he battles hunger and pride, he experiences hallucinations, intense mood swings, and an inner conflict between his physical needs and artistic ideals. The novel offers a raw, stream-of-consciousness portrait of isolation, desperation, and the fragile line between genius and madness.

It's considered a groundbreaking work in modernist literature for its deep psychological insight and innovative narrative style.