The Hitchhiker's Guide to the Galaxy (novel) productions in the late 1970s. Davies himself appears as Prosser. This edition is out of print – Adams bought up many remainder copies and sold them, autographed, on his website. There have been three audiobook recordings of the novel. The first was an abridged edition (), recorded in the mid-1980s by Stephen Moore, best known for playing the voice of Marvin the Paranoid Android in the radio series, LP adaptations and in the TV series. In 1990, Adams himself recorded an unabridged edition for Dove Audiobooks (), later re-released by New Millennium Audio () in the United States and available
Phrases from The Hitchhiker's Guide to the Galaxy reference to Hitchhikers. The number 47 appears often throughout the "Star Trek" franchise. When producer Rick Berman was asked about the unusual frequency of the number, he stated, "47 is 42, corrected for inflation." In the series, "Don't Panic" is a phrase on the cover of "The Hitchhiker's Guide to the Galaxy". The novel explains that this was partly because the device "looked insanely complicated" to operate, and partly to keep intergalactic travellers from panicking. "It is said that despite its many glaring (and occasionally fatal) inaccuracies, the "Hitchhiker's Guide to the Galaxy" itself has outsold the "Encyclopedia Galactica" because