The third Tom Swift series was launched following the Stratemeyer Syndicate moving publishers to Simon & Schuster.
This series took place in outer space and featured fan-favorite character Aristotle the Robot, who was introduced in the second volume.
Two titles — Chaos on Earth and The Micro World — were written by Neal Barrett, but not published before its cancellation.
The fourth Tom Swift series was created as a counterpart to The Nancy Drew Files and The Hardy Boys Casefiles spin-offs, and was published by Archway from 1991 to 1993.
A seventh title, Extraterrestrial Highway, was planned for publication in February 2008; however, it ultimately remained unpublished.