Start with high-confidence healthcare industry books, then narrow by subgenre or adjacent topics.
An American Sickness
Elisabeth Rosenthal
Random Acts of Medicine
Anupam B. Jena, Christopher Worsham
Pharma and Profits
John L. LaMattina
Wounds of War
Suzanne Gordon
Introduction to the Financial Management of Healthcare Organizations, Eighth Edition
Michael Nowicki
Introduction to the Financial Management of Healthcare Organizations, Ninth Edition