The information revealed inside primarily comes from production documents that were donated by Star Trek creator/producer Gene Roddenberry and show co-producer Robert H. Justman to the UCLA Film and Television Archive.
In 2021, These Are the Voyages: TOS, Season One was turned into an audiobook, narrated by Vic Mignogna, it features a guest of over 100 voice actors chronicling the creation of Star Trek.
Also included in this second book are excerpts of fan mail and many other indications that Star Trek had become a huge success despite the series uncertain future.
Also included are NBC's decision to move the show to the 10:00 pm Friday night "death slot", Roddenberry reducing his direct involvement and being replaced by Fred Freiberger as the producer, the budget cuts that significant reduced the quality of the show, and what ultimately became a futile fan campaign to save Star Trek again from cancellation.
As the fandom grew, Paramount finally acknowledged the enduring impact of the series, leading to the development of Star Trek - The Motion Picture.
The third volume dives deep into the making, the release, and the reception of Star Trek - The Motion Picture, covering topics from merchandising to script development to Jerry Goldsmith's epochal music score.
[1] Cushman was too busy with his own career as a screenwriter and director to begin work on the book until after Roddenberry had died, but during those years, he continued to collect interviews from the creative staff (Justman, D.C. Fontana, John D. F. Black), members of the production crew, the cast, and guest players.