How to Find Experts to Read Your Book

For world building purposes in particular, make sure that you find a few experts. Like when I was doing Way of Kings, I needed one of my characters to know field medicine. So I actually went and got a doctor to read the book. In academia, this is referred to as primary sources. You never do a research paper that only has secondary sources. No, you go straight to the people who know about it and talk to them.