I can't immediately find it right now, but if memory serves, the last time this came up, "The Hitchhiker's Guide to the Galaxy" and "Stranger in a Strange Land"

I can't immediately find it right now, but if memory serves, the last time this came up, "The Hitchhiker's Guide to the Galaxy" and "Stranger in a Strange Land" seemed to be the strongest answers. I have since read, enjoyed, and been influenced by both. Neither are properly regarded as "non-technology," but I think from your point 2 it's clear that you are just looking to exclude training manual type texts. Hitchhiker's in particular imparts a lot of great advice for creativity in technical fields, and software in particular, but does it using a fictionalized world with comedic logical oddities. Another book I'll add, which has some of these properties, is "Jitterbug Perfume" by Tom Robbins (although take note that this book is highly erotic and explicit).