This book could’ve been about 100 pages instead of 500. It took a long time for the key points to be made. I am a physician assistant. I think this book was the wrong choice for me. I do not need to have medical concepts explained, especially not repeatedly and stated in different ways. The author does mention at the start of the book that he’s going to make things as understandable as possible to readers. I gleaned a lot of new information, but it took me weeding through a bunch of unnecessary stories to get there.