La Guia Galàctica per a Autoestopistes, en anglès the hitchhiker's guide to the galaxy, és una radiocomèdia escrita l'any 1978 per Douglas Adams. La va seguir un seguit de llibres, una sèrie de televisió, un joc i una versió cinematogràfica l'any 2005. Totes les diverses versions segueixen la mateixa trama, tot i que …
Panic! It's the last installment of The Hitchhiker's Guide to the Galaxy, with a brand new full-cast dramatization of Mostly Harmless, the final book in Douglas Adams' famous "trilogy in five parts." While frequent flyer Arthur Dent searches the universe for his lost love, Ford Prefect discovers a disturbing blast …
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 book was followed by a sequel, The Long Dark Tea-Time of the …