The Newcastle Forgotten Fantasy Library was a series of trade paperback books published in the United States by the Newcastle Publishing Company between 1973 and 1980. Presumably under the inspiration of the earlier example set by the Ballantine Adult Fantasy series, the series reissued a number of works of fantasy literature that had largely been forgotten, being out of print or otherwise not easily available in the United States, in durable, illustrated trade paperback form with new introductions. For a number of works the Library’s editions constituted the first U.S. or first paperback edition. Together with the earlier series from Ballantine Books, it contributed to the renaissance of interest in the fantasy genre of the 1970s.