I did not mention Douglas Adams because it felt obvious; but came back to say that the Hitchhiker's Guide is great, but the first Dirk Gently book is my favourite book in all of space and time!
I'm just going to have to buy the Bobverse book(s), I put in the request for my library to get it after the first few times it was recommended, and they keep rejecting it.
Comments
Robert Asprin's Phule's Company series
https://a.co/d/0SGPhWX
* Heinlein for the classics?
The "Red Darkling" series by L. A. Guettler
"Life in the 'Cosm" and "The Stealth Lovers" by Cait Gordon