Not exactly the same question, but you might want to consider some of the examples in this thread.
I’d say anytime before the 1800’s - would be a good book that actually described how the body works and how to keep it in health. Something that WOULDN"T depend upon medicines and machinery only available now. Followed by a book that told how to manufacture ether and chloroform.
Something like the manual used by: Barefoot doctor - Wikipedia
Except I’d have to rip out the pages which described “traditional medicine”. (You know the saying - if “alternative medicine” is shown to work - it becomes part of just - “medicine”.)