I was happy to read a book written by an M.D. who actually listens to his patients and not so much to blood-tests. He recognizes that patient's symptoms and history should be the deciding factor, with blood-tests being secondary (although hopefully confirming his diagnosis). He doesn't go into extreme detail on each individual hormone, as much as you would get in a book dedicated to that (naturally), but he provides a lot of good info on physiology and treatments. Case histories are also used as examples throughout the book.
I only really have two complaints about the book: One, his explanation of iodine-deficiency in hypothyroidism. Like much of the medical community, he holds to the belief that you only have iodine-deficiency if you have a goiter, otherwise that isn't the cause of your problem. But a goiter is at the extreme range of iodine deficiency, and there is a lot of room for dysfunction before then. Other medical experts say that your thyroid alone needs 3mg consistently to be fully saturated and functional. There is no way you are getting that much in the standard American diet, even with iodized salt. Not even remotely. Contrast that with Japanese people who get about 13 mg a day! Iodine is not to be feared and treated like a trace mineral. It is absolutely vital to the whole body, not just the thyroid.
My second (smaller) complaint is about his "ideal diet." He does admit that Americans eat too many carbs and sugar, which is great (and true), but he still mentions eating lean meats and small amounts of healthy fats. Again, there is nothing inherently evil or unhealthy about most fats. Yes, some forms of saturated fat are bad for you, but some are absolutely healthy and should be eaten regularly. Also, eating fats with carbs causes problems of it's own, but it's not the fat alone that is causing the problem. This has been very well documented in various books (Good Calories, Bad Calories, Primal Body, Primal Mind, etc).
If you'd like further reading on the topics in his book, I recommend "Adrenal Fatigue" by James Wilson, and "Iodine: Why You Need It, Why You Can't Live Without It".