Sielun pitkä pimeä teehetki on Douglas Adamsin vuonna 1988 ilmestynyt romaani. Komedian, etsiväromaanin, fantasian ja scifin aineksia yhdistävä teos on Adamsin toinen romaani, jossa esiintyy yksityisetsivä Dirk Gently. Sarjan ensimmäinen osa oli Dirk Gentlyn holistinen etsivätoimisto.
So Long, and Thanks for All the Fish is the fourth book of the Hitchhiker's Guide to the Galaxy trilogy written by Douglas Adams. Its title is the message left by the dolphins when they departed Planet Earth just before it was demolished to make way for a hyperspace bypass, as described in The Hitchhiker's Guide to …
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 …