Note: There are other series with the same name: Paradox, Paradox (Laurey and Wilder), Paradox (Phillip P. Peterson), Paradox (Roberts)
- Series: Paradox (Charles Cloukey) Series Record # 48309
- Series Tags: antigravity (3), Martians (3), time machine (2), hypnosis machine (1), invisible man (1), flight disk (1), Mad Martian (1), time cube (1), Martian peril (1), invisible plane (1)
- Paradox (Charles Cloukey)
- 1 Paradox (1929) [SF] by Charles Cloukey
- 2 Paradox + (1930) [SF] by Charles Cloukey
- 3 Anachronism (1930) [SF] by Charles Cloukey