I encountered a book from the Seattle public library in the 90's that I am still looking to identify to this day.

I remember it being slightly oversized, maybe 10" x 14". I believe it was mostly graphical, where each page (or double page) was mostly self-contained content. This content was -- if recalling correctly -- almost entirely fake, found-like content from the future:

* fake advertisements for things like flying cars
* extremely detailed cutaways of spaceships (e.g. like for cruise ships, but for space)
* newspaper articles / clippings from events happening

I wish I had more to go on, but that's about it.

I remember one flying car advertisement of a red car in the foreground with a couple of young women in the backseat, and behind them another car (maybe green?) zooming off to really send home they were flying cars. Otherwise, content like this could have been an ad from the 50's for a new Chevy.

I've since learned the style was similar to, if not explicitly, retrofuturism.