I've posted this before, but here's a book by a very good Sci-Fi author, only this one is who-dunnit about the murder of a gun collector
It's also available on Librivox as a free audiobook:
https://librivox.org/murder-in-the-gunroom-by-h-beam-piper/
Piper wrote a couple more Jeff Rand mystery novels that never reached publication and are now lost.
Here's the Piper section in my clubhouse, right next to Heinlein. It's lean because I have all of his works on audiobook and/or PDF, along with a copy of John F. Carr's excellent biography of Piper.
And I'd really like to visit your club and discuss the finer points of guns, sci-fi and life Dave. I'm a bit envious since all I have is cluttered garage
Feel free to PM me for my email address, for an extend e-chat if things ever get boring at your end -- sounds like you stay busy, though!
He almost nailed it there, the only thing he missed was not making it a rebreather system, otherwise its an exceptionally accurate description of the real spacesuites for the moon expeditions that was to follow some years later.
Yeah, Heinlein's idea was to cool the suit's wearer using oxygen expansion and venting, something International Latex found a better, more efficient way to do by circulating cool water through underwear. He used compressed oxygen expansion again for cooling a bomb shelter in Farnham's Freehold.
Another reason I particularly like
Have Spacesuit is that I have a small slide rule collection. I'm crap at math, but I love the old-school instruments.
If you haven't already seen this, check out this episode of Moon Machines (outstanding Science Channel series!) on the design of the lunar EVA suit:
For a truly prescient novel of the future, Heinlein's
The Moon is a Harsh Mistress has at least three correct predictions: lunar ice, low gravity physiological adaptation (he overestimates the effect), and computer generated graphics.