A work of online serial fiction by blogger Scott Alexander, formerly of Slate Star Codex, now of Astral Codex Ten.

Goodreads has a decent intro blurb: https://www.goodreads.com/fr/book/show/28589297-unsong

If you're unsure whether his writing style is your thing, feel free to sample his shorter fiction from his blog:

https://slatestarcodex.com/2015/06/02/and-i-show-you-how-dee...

https://slatestarcodex.com/2015/04/21/universal-love-said-th...

https://astralcodexten.substack.com/p/idol-words

Thanks. The goodreads blurb makes me think it's something like Salmon Rushdie or a Kevin Smith (with less toilet humor) take on things.