Books in Science Fiction (sorted alphabetically)
- island of Doctor Moreau H. G. Wells
- Islands of Space Jr. John W. Campbell
- Issahar Artifacts Jesse F. Bone
- It Could Be Anything Keith Laumer
- I, the Unspeakable Walter J. Sheldon
- It's All Yours Sam Merwin
- It's a Small Solar System Allan Howard
- I Was a Teen-Age Secret Weapon Richard Sabia
- Jack of No Trades Evelyn E. Smith
- Jameson Satellite Neil R. Jones
- Jamieson William R. Doede
- Jaywalker Ross Rocklynne
- Jewels of Aptor Samuel R. Delany
- Jewels of Gwahlur Robert E. Howard
- Jimsy and the Monsters Walter J. Sheldon
- John Jones's Dollar Harry Stephen Keeler
- Join Our Gang? Sterling E. Lanier
- Journey in Other Worlds: A Romance of the Future John Jacob Astor
- Journey into the Interior of the Earth Jules Verne
- Journey to the Center of the Earth Jules Verne
- Journey to the Centre of the Earth Jules Verne
- Journey to the Interior of the Earth Jules Verne
- Jubilation, U.S.A. G. L. Vandenburg
- Judas Ram Sam Merwin
- Judas Valley Randall Garrett and Robert Silverberg