The median book about medicine is over 100 years old, written in a language you don't speak, and filled to the brim with quackery. Worse than useless. Maybe you don't realize that bookstores and libraries only carry a minuscule fraction of all published works? You will get better information from reddit than from a book written before the discovery of penicillin.

I'll get you started with one of the great works from the 1600s:

https://www.gutenberg.org/cache/epub/49513/pg49513-images.ht...