Really liked these as a kid. Upon rereading, I note that:
Volume I and Volume II still hold up to where I had placed them in nostalgia. Happy Ent is right that Bakker's Inchoroi are the Golgafrinchan B Ark--and I'd add that the sperm whale suddenly called into existence by the Infinite Improbability Drive in part I looks like the original source for Bakker's No-God:
This is a complete record of its thought from the moment it began its life till the moment it ended it.
Ah...! What's happening? it thought.
Er, excuse me, who am I?
Hello?
Why am I here? What's my purpose in life?
What do I mean by who am I?(95). And so on. Bakker is essentially writing a dyssatircal gloss on Adams.
Volume III keeps the tone but changes the subject matter of the first two installments, taking on subject matter that was not present for the earlier bits, but also seeming to abandon the narrative of the first two.
No idea what the point of Volume IIII is. Volume V, alright, but meh. It looks like it ends a cliffhanger similar to the sixth
Dune or
Farscape season 4. Still a good sense of humor throughout, and definitely a major component of the geocentric aliens subgenre.
Recommended for slugs with rocket launchers, people who wondered where Elvis went, and depressed robots.