The Star Trek franchise's first tie-in publications were James Blish's 1967 volume of episode novelizations and Mack Reynolds's 1968 young adult novel Mission to Horatius. Since 1968, more than 850 original novels, short story collections, episode and film novelizations, and omnibus editions have been published. Novels based on Star Trek, The Next Generation, Discovery, and Picard are currently in print. As recently as 2020, novels based on Deep Space Nine, Enterprise, and Voyager were published. Original concept and flagship series such as New Frontier, Titan, Seekers, and Vanguard have also been published since 1994. Official publishers of Star Trek novels include Simon & Schuster and U.K. publisher Titan Books. Bantam Books published novels from 1967 to 1981. Past publishers include: Western Publishing, Random House imprints Ballantine and Del Rey Books, Science Fiction Book Club. Publishers Heyne and Cross Cult publish German-language translations of Star Trek novels. In 2001, Pocket Books estimated there were 85 million copies in print. Michael Epstein, writing for Television Quarterly in 1996, said Star Trek was "by far the biggest series of fiction in the history of western literature". Source: Wikipedia (en)