What is a deserted island novel?

Desert island novels are a type of adventure novel with a compact plot and full of thrills. Usually, the protagonist spends long and lonely years on a deserted island, facing all kinds of dangers and challenges, trying to find a way home. These novels often included the horror events that the protagonist encountered on a deserted island, the struggles with wild animals, the difficult struggle for survival, and so on. Some desert island novels would also involve politics, religion, human nature, and other topics to explore the plight and thoughts of the protagonist on the desert island.