"[2] Foster also wrote the follow-up novel Splinter of the Mind's Eye (1978), written with the intention of being adapted as a low-budget sequel to Star Wars if the film was unsuccessful.

He has the story credit for Star Trek: The Motion Picture,[5] as he wrote a treatment based on a two-page outline by Gene Roddenberry.

[7] In 2020, Foster, together with the Science Fiction and Fantasy Writers of America (SFWA), alleged that The Walt Disney Company, which acquired rights to his Star Wars and Alien novels via their acquisitions of Lucasfilm and 20th Century Fox, had not paid him royalties for e-book sales of his books.

[8][9][10] The issue was resolved in May 2021, when Disney arranged to pay Foster and his fellow Star Wars novelization authors James Kahn and Donald F. Glut their royalties.

"Serenade" (2004), a novelette set immediately after The Time of the Transference,[16] was first published in the anthology Masters of Fantasy and was later reprinted in Foster's short story collection Exceptions to Reality.