Sylvia Engdahl is the author of ten science fiction novels, six of which are Young Adult novels that are also enjoyed by adults. The one for which she is best known, Enchantress from the Stars, was a Newbery Honor book, winner of the 1990 Phoenix Award of the Children’s Literature Association, and a finalist for the 2002 Book Sense Book of the Year in the Rediscovery category. Her four latest novels, the Hidden Flame series and the Rising Flame series, are for adults. Recently, she has published an updated and expanded edition of her nonfiction book The Planet-Girded Suns, now subtitled “The History of Human Thought About Extrasolar Worlds.” She is a strong advocate of space colonization and in addition to a widely-read space section of her website she created the site www.spacequotes.com, which contains quotations about why humankind must expand into space. From her home in Eugene, Oregon she now works as a freelance editor of nonfiction anthologies for high schools.