Note: There are other series with the same name: Letters (Aurealis), Letters (Exuberance), Letters (F&SF), Letters (Imagination), Letters (Marion Zimmer Bradley's Fantasy), Letters (Science Fiction Monthly), Letters (The Baum Bugle)
- Series: Letters (Other Worlds) Series Record # 25764
- Letters (Other Worlds)
- Letters (Other Worlds, November 1949) (1949) [ES] by Raymond A. Palmer [only as by Robert N. Webster]
- Letters (Other Worlds, May 1950) (1950) [ES] by Raymond A. Palmer
- Letters (Other Worlds, July 1950) (1950) [ES] by Raymond A. Palmer
- Letters (Other Worlds, September 1950) (1950) [ES] by Raymond A. Palmer
- Letters (Other Worlds, January 1952) (1952) [ES] by Raymond A. Palmer
- Letters (Other Worlds, March 1952) (1952) [ES] by Raymond A. Palmer
- Letters (Other Worlds, April 1952) (1952) [ES] by Raymond A. Palmer
- Letters (Other Worlds, July 1952) (1952) [ES] by Raymond A. Palmer
- Letters (Other Worlds, August 1952) (1952) [ES] by Raymond A. Palmer
- Letters (Other Worlds, October 1952) (1952) [ES] by Raymond A. Palmer
- Letters (Other Worlds, November 1952) (1952) [ES] by Raymond A. Palmer
- Letters (Other Worlds, December 1952) (1952) [ES] by Raymond A. Palmer
- Letters (Other Worlds, January 1953) (1953) [ES] by Raymond A. Palmer
- Letters (Other Worlds, February 1953) (1953) [ES] by Raymond A. Palmer
- Letters (Other Worlds, March 1953) (1953) [ES] by Raymond A. Palmer
- Letters (Other Worlds, April 1953) (1953) [ES] by Raymond A. Palmer
- Letters (Other Worlds, May 1953) (1953) [ES] by Raymond A. Palmer
- Letters (Other Worlds, June 1953) (1953) [ES] by Raymond A. Palmer
- Letters (Other Worlds, July 1953) (1953) [ES] by Raymond A. Palmer
- Letters (Other Worlds, May 1955) (1955) [ES] by Raymond A. Palmer
- Letters (Other Worlds, July 1955) (1955) [ES] by Bea Mahaffey and Raymond A. Palmer
- Letters (Other Worlds, September 1955) (1955) [ES] by Bea Mahaffey and Raymond A. Palmer
- Letters (Other Worlds, November 1955) (1955) [ES] by Joe Gibson and Raymond A. Palmer
- Letters (Other Worlds, February 1956) (1956) [ES] by Raymond A. Palmer
- Letters (Other Worlds, April 1956) (1956) [ES] by Raymond A. Palmer
- Letters (Other Worlds, June 1956) (1956) [ES] by Raymond A. Palmer
- Letters (Other Worlds, September 1956) (1956) [ES] by Raymond A. Palmer
- Letters (Other Worlds, November 1956) (1956) [ES] by Raymond A. Palmer
- Letters (Other Worlds, January 1957) (1957) [ES] by Raymond A. Palmer
- Letters (Other Worlds, June 1957) (1957) [ES] by Raymond A. Palmer
- Letters (Other Worlds, July 1957) (1957) [ES] by Raymond A. Palmer
- Letters (Other Worlds, October 1957) (1957) [ES] by Raymond A. Palmer