John Steinbeck wrote "The Grapes of Wrath," published in 1939. This novel is set during the Great Depression and follows the journey of the Joad family as they migrate from Oklahoma to California in search of a better life. Through vivid storytelling, Steinbeck highlights the struggles and injustices faced by migrant workers and the socio-economic hardships of the era. The book is praised for its compassionate portrayal of human suffering and perseverance, making it a significant piece of American literature that continues to resonate with readers today.