Children of Dune
Parts of "Dune Messiah" (and its sequel "Children of Dune") were written prior to the completion of "Dune" itself. The novel appeared initially as a five part serial in "Galaxy Science Fiction" magazine published from June (cover dated July) to October (cover dated November) 1969 with illustrations by Jack Gaughan. A Putnam hardback edition also appeared in October 1969. The American and British editions contain different prologues which summarized the events of "Dune". "Dune Messiah" and "Children of Dune" were published in a single volume by the Science Fiction Book Club in 2002, and in 1979 by Gollancz with "Dune" and "Children of Dune" as "The Great Dune Trilogy".