The 'Classic' series of Dune novels consists of 6 books, all written by Frank Herbert.
The first novel, simply titled Dune, was published in 1965. It won the Hugo Award in 1966.
Published in 1969, Dune Messiah was the second book in the series, and took place 12 years after Dune.
The Hugo Award nominated Children of Dune was published in 1976, and took place shortly after Dune Messiah.
Taking place 35,000 years after Paul Atreides becomes Emperor, God Emperor of Dune was published in 1981.
The penultimate book in the classic Dune series, Heretics of Dune, was published in 1984, and takes place 1,500 years after the previous book.
Finally, Chapterhouse Dune is the the last book in the classic Dune series, and was published in 1985.
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