David Gerrold is an award-winning writer whose first professional sale was the classic Star Trek episode "The Trouble with Tribbles". In addition to his Trek screenwriting and prose fiction work, he also wrote two non-fiction books: The World of Star Trek, and The Making of The Trouble With Tribbles.
He also played an Enterprise crew member in the Star Trek: Deep Space Nine episode "Trials and Tribble-ations". Gerrold also wrote the foreword of the novelization of that episode and later wrote the introduction of the Constellations anthology.
He wrote the introduction to Stephen Goldin for TOS novel: Trek to Madworld and another for Kathleen Sky in TOS novel: Vulcan!. His book, "The Martian Child", was largely auto-biographical and recently adapted for the screen.