Frank Herbert Collection. Children of Dune 0-399-11697-4 Printed 1976 God Emperor of Dune 0-399-12593-0 Printed 1981 The White Plague 0-39912721-6 Printed 1982 The Lazarus Effect 0-399-12815-8 Printed 1983 Heretics of Dune 0-399-12898-0 Printed 1984 Chapterhouse:Dune 0-399-13027-6 Printed 1985 5 of the 6 books are from a library. They are all in great shape. Dust jackets are clean with little wear. Pages are crisp.