Hell's foundations quiver
(Book)

Centuries ago, the human race fought its first great war against an alien race, and lost. A tiny population of human beings fled to distant Safehold. Centuries later, their descendants have forgotten their history; for them, life has been an eternal Middle Ages, ruled by the Church of God Awaiting, whose secret purpose is to prevent the re-emergence of industrial civilization. But not all of Safehold's founders were on board with this plan... --Publisher.