First of the Preludes Trilogy.
Written by Brian Herbert and Kevin J. Anderson this book details events leading up to Dune.
Shaddam IV takes the Imperial Throne. Duke Paulus is assassinated to be replaced by Leto I. Duncan Idaho enters the service of House Atreides. Baron Harkonnen sires a daughter by the Bene Gesserit. Pardot Kynes begins plans for the ecological transformation of Arrakis.