Start with high-confidence medical history books, then narrow by subgenre or adjacent topics.
The Lost Art of Dying
L.S. Dugdale, Lydia S. Dugdale
Virus Hunt
Dorothy H. Crawford
Ancient Remedies
Dr. Josh Axe, Josh Axe
Ten Drugs
Thomas Hager, Angelo Di Loreto
The Dore Lectures on Mental Science
Thomas Troward
The Emperor of All Maladies
Siddhartha Mukherjee, Fred Sanders