Books in Science Fiction (sorted alphabetically)
- Moral Equivalent Kris Neville
- Most Sentimental Man Evelyn E. Smith
- Mother America Sam McClatchie
- Mr. Spaceship Philip K. Dick
- mummy and Miss Nitocris : a phantasy of the fourth dimension George Chetwynd Griffith
- Music Master of Babylon Edgar Pangborn
- Mutineer Robert Shea
- My Fair Planet Evelyn E. Smith
- My Father, the Cat Henry Slesar
- My Friend Bobby Alan Edward Nourse
- My Lady Greensleeves Frederik Pohl
- My Lady Selene Magnus Ludens
- My Shipmate—Columbus Stephen Marlowe
- Mysterious Island Jules Verne
- Mysterious Island Jules Verne
- Naar het middelpunt der Aarde (Dutch) Jules Verne
- Name Your Symptom Jim Harmon
- Native Soil Alan Edward Nourse
- Native Son T. D. Hamm
- Naudsonce H. Beam Piper
- Navy Day Harry Harrison
- Never Come Midnight H. L. Gold
- New Apples in the Garden Kris Neville
- New Hire Dave Dryfoos
- New Lamps Robert Moore Williams