Was John Steinbecks Travels With Charley a fraud?

Was John Steinbeck’s Travels With Charley a fraud?
“My initial motives for digging into Travels With Charley were totally innocent. I simply wanted to go exactly where Steinbeck went in 1960, to see what he saw on the Steinbeck Highway, and then to write a book about the way America has and has not changed in the last 50 years.”