2005. The book contains a novelette called Spice Planet (an alternative version of Dune based on an outline by Frank Herbert), a number of the Brian Herbert/Anderson short stories, and letters and unused chapters written by Frank Herbert. In the 1999 gazetteer The Stars and Planets of Frank Herbert's Dune: A Gazetteer (1999), Joseph M. Daniels estimates the distance from Earth in light-years (ly) for many Dune planets, based on the real-life distances of the stars and planetary systems referenced by Frank Herbert when discussing these planets in the glossary of the novel Dune. Though Herbert used the names of actual stars and planetary systems in his work, there is no documentation supporting or disputing the assumption that he was, in fact, referring to these real-life stars or systems. The Science of Dune (2008) analyzes and deconstructs many of Herbert's concepts and fictional inventions. Themes and influences The Dune series is a landmark of soft science fiction. Herbert deliberately suppressed technology in his Dune universe so he could address the politics of humanity, rather than the future of humanity's technology. Dune considers the way humans and their institutions might change over time. Jon Michaud of The New Yorker called the originating novel Dune "an epic of political betrayal, ecological brinkmanship, and messianic deliverance." Director John Harrison, who adapted Dune for Syfy's 2000 miniseries, called the novel a universal and timeless reflection of "the human condition and its moral dilemmas", and said: Novelist Brian Herbert, Frank Herbert's son and biographer, explained that "Frank Herbert drew parallels, used spectacular metaphors, and extrapolated present conditions into world systems that seem entirely alien at first blush. But close examination reveals they aren't so different from systems we know". He wrote that the invaluable drug melange "represents, among other things, the finite resource of oil". Michaud explained, "Imagine a substance with the combined worldwide value of cocaine and petroleum and you will have some idea of the power of melange." Each chapter of Dune begins with an epigraph excerpted from the fictional writings of the character Princess Irulan. In forms such as diary entries, historical commentary, biography, quotations and philosophy, these writings set tone and provide exposition, context, and other details intended by Herbert to enhance understanding of his complex fictional universe and themes. Michaud wrote in 2013, "With daily reminders of the intensifying effects of global warming, the spectre of a worldwide water shortage,