It’s been a long time since I read the book of the same name from Douglas Adams, so I can’t speak for any real connection between that and the TV show, although I get the feeling that they’re a fair distance apart. Either way though the two series that there are of this are a glorious maelstrom of the absurd. It’s in the same sort of realm as Terry Gilliam’s work but perhaps more self indulgent in it’s strangeness.
There won’t be a third series apparently, which is a shame given the storylines set up to play out but what’s already out there is well worth a watch.