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 (Other Worlds), Letters (The Baum Bugle)
- Series: Letters (Science Fiction Monthly) Series Record # 31970
- Letters (Science Fiction Monthly)
- Letters (Science Fiction Monthly, April 1974) (1974) [ES] by The Readers
- Letters (Science Fiction Monthly, May 1974) (1974) [ES] by The Readers
- Letters (Science Fiction Monthly, June 1974) (1974) [ES] by The Readers
- Letters (Science Fiction Monthly, July 1974) (1974) [ES] by The Readers
- Letters (Science Fiction Monthly, August 1974) (1974) [ES] by The Readers
- Letters (Science Fiction Monthly, September 1974) (1974) [ES] by The Readers
- Letters (Science Fiction Monthly, October 1974) (1974) [ES] by The Readers
- Letters (Science Fiction Monthly, December 1974) (1974) [ES] by The Readers
- Letters (Science Fiction Monthly, January 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, February 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, March 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, April 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, July 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, August 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, September 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, October 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, November 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, December 1975) (1975) [ES] by The Readers
- Letters (Science Fiction Monthly, January 1976) (1976) [ES] by The Readers
- Letters (Science Fiction Monthly, February 1976) (1976) [ES] by The Readers
- Letters (Science Fiction Monthly, March 1976) (1976) [ES] by The Readers
- Letters (Science Fiction Monthly, April 1976) (1976) [ES] by The Readers