What was John Steinbeck's last literature before he died?

Answer 1

Steinbeck died December 20, 1968.
America and Americans was published in 1966, and was the last work published in his lifetime.

Travels with Charley, published in 1962, was his last major book.

But the last "literature" book he wrote would be Winter of Our Discontent, published in 1961.
http://en.wikipedia.org/wiki/The_Winter_of_Our_Discontent

Answer 2

Mr Steinbeck's last literature was The Winter of Our Discontent, which was published in 1961. He died in 1968.

Answer 3

Working Days: The Journals of the Grapes of Wrath 1938–1941
(1989)

Answer 4

King Arthur book was unfinished and published posthumously.