I've read about this! It's called plastination!
You take a body and dip it into acetone. This sucks out and replaces any water in it. Then you take the acetone-soaked body, dip it into some flavor of plastic or polymer or epoxy and pull a vacuum on it. The acetone evaporates, the plastic gets sucked into where it was, and voila!
You got yourself a full sized Ken doll.
The book was Mary Roach's Stiff: The Curious Lives of Human Cadavers. It's an interesting book, but be prepared to read it in sections. You'll get parts that are less fun than plastic people, something like dead pets, and tell yourself "Okay, that's enough reading for today."
Most of her other books don't have those hard sections and are fun the whole way through. She'll take a subject and do a bunch of interviews and history of it.
Bonk: It's about sex. I'm pretty sure the Kinsey Report was included, and a section where Mary got her husband to agree to have sex with her while they were in some kind of cat scan or something similar.
Packing for Mars: space travel. Interesting bits included a test for prospective Japanese astronauts where over the course of a week they have to fold 1000 origami cranes and attach them to a string in order of completion, in between finishing all their other jobs. Do they start to get sloppy as the deadline approaches?
Another part was about how equipment gets tested before being sent into space. Everything gets loaded onto the Vomit Comet and subjected to thirty seconds intervals of weighlessness to see if it'll work without gravity. Including a new toilet. Which meant some intern has to be ready and primed when that thirty seconds started and finish before it ended. No Candy Crush for him.
Gulp: food and eating. I remember one story about someone (I want to say a Canadian fur trapper), who got shot in the side and the wound never healed right. There was a fistula left open to his stomach. So some doctor wanting to do research into how food was digested would tie a bit of something to a string, drop it in, and pull it out later.
Grunt: soldiers and combat. There's one section about soldiers who get wounded in the groin, and how it becomes a tough to talk about issue now only with them but with their partners. Prosthetic scrotums are mentioned.
And looking at her wikipedia page right now, it turns out I missed her publishing a new book, Replaceable You: Adventures in Human Anatomy, last year. But my local library has a copy, so now I've got plans for this weekend!