The "Emigrants Trilogy" is a series of novels written by Swedish author Vilhelm Moberg. It consists of four books: The Emigrants, Unto a Good Land, The Settlers, and The Last Letter Home. The trilogy follows the journey of Swedish peasants who emigrate to America in the 19th century, exploring their struggles, hopes, and the challenges they face in a new land. The story centers on the character Karl Oskar and his family, depicting their hardships and triumphs as they adapt to life in Minnesota. The trilogy highlights themes of identity, belonging, and the immigrant experience, making it a significant work in Swedish literature.