The Hitchhiker's Guide to the Galaxy

Dirk Gently's Holistic Detective Agency is a humorous detective novel by Douglas Adams, first published in 1987. It is described by the author on its cover as a "thumping good detective-ghost-horror-who dunnit-time travel-romantic-musical-comedy-epic".

The Hitchhiker's Guide to the Galaxy is a fictional electronic guide book in the multimedia scifi/comedy series of the same name by Douglas Adams. The Guide serves as "the standard repository for all knowledge and wisdom" for many members of the series' galaxy-spanning civilization. Entries from the guidebook are used as comic narration to bridge events and provide background information in every version of the story. The guide is published by "Megadodo Publications", a publishing company on Ursa Minor Beta.

The Hitchhiker's Guide to the Galaxy was a BBC television adaptation of Douglas Adams's The Hitchhiker's Guide to the Galaxy broadcast in January and February 1981 on UK television station BBC Two. The adaptation follows the original radio series in 1978 and 1980, the first novel and double LP, in 1979, and the stage shows, in 1979 and 1980, making it the fifth iteration of the guide. The series stars Simon Jones as Arthur Dent, David Dixon as Ford Prefect, Mark Wing-Davey as Zaphod Beeblebrox and Sandra Dickinson as Trillian. The voice of the guide is by Peter Jones. Simon Jones, Peter Jones, Stephen Moore and Mark Wing-Davey had already provided the voices for their characters in the original radio series in 1978/80. In addition, the series features a number of notable cameo roles, including Adams himself on several occasions.