Unique themes. For example, a book might deal with a rarely explored aspect of human nature like in 'Interpreter of Maladies' which looks at the often unspoken feelings of immigrants.
One is 'Interpreter of Maladies' by Jhumpa Lahiri. It won the Pulitzer Prize. The stories in this book beautifully explore the immigrant experience, family relationships, and cultural clashes.
Many Nobel Prize winning fiction books often have deep insights into human nature. For example, they can show the complex emotions, desires, and moral dilemmas of characters. Just like in 'The Old Man and the Sea', the old man's unwavering determination in the face of the vast sea reveals his strong will and also reflects on the relationship between man and nature.
Often, they have a very engaging plot. For example, 'The Da Vinci Code' which won some awards has a complex and fast - paced plot that keeps readers hooked.