Is Route 66 is mentioned in the book The Grapes of Wrath?

Yes, Route 66 is mentioned in the book "The Grapes of Wrath" by John Steinbeck. The novel's protagonist, Tom Joad, and his family travel along Route 66 during their journey from Oklahoma to California in search of a better life. The novel describes the harsh conditions of the Dust Bowl era and the struggles faced by migrant workers during the Great Depression. Route 66 serves as a symbol of the Joad family's journey and the hardships they endure along the way.