Final answer:
The author of The Grapes of Wrath is John Steinbeck. The novel tells the story of Dust Bowl migrants in Depression-Era California and explores themes of poverty and social injustice.
Step-by-step explanation:
The author of The Grapes of Wrath (1939), the saga of Dust Bowl migrants in Depression-Era California, is John Steinbeck. The novel tells the story of the Joad family who are forced to leave their home due to the Dust Bowl and travel to California in search of a better life. Steinbeck's work explores themes of poverty, social injustice, and the resilience of the human spirit.