New York, Doubleday, 1960. First Edition. First Impression. Hardback. A very good copy. One of Anderson's rarer works. Aliens in medieval England [Pringle, 1995]. A presentable copy, some trivial rubbing to the corners, heavier to the spine, with one short tear (3mm). A little crushing to the top of the jacket to rear. Rear panel a little toned. A nice copy overall. Uncommon, and nominated for the Hugo award. Cover art by Harry Schaare [7987, Hyraxia Books].