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. In the UK she is known for the YA novel published there as "Heritage of the Star," which is currently available only under its original US title "This Star Shall Abide." Her four latest novels, "Stewards of the Flame," "Promise of the Flame," "Defender of the Flame," and "Herald of the Flame" are for adults. Recently, she has published an updated and expanded edition of her nonfiction book "The Planet-Girded Suns," first published in 1974 with the subtitle "Man's View of Other Solar Systems" and now subtitled "The History of Human Thought About Extrasolar Worlds." She is a strong advocate of space colonization and has maintained a widely-read space section of her website for many years. She also 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. She welcomes visitors to her website at www.sylviaengdahl.com.