I bought this book to use a reference for my character Zillah. She has a built-up knowledge of herbal medicines and of emergency field medical procedures, but I don’t. I used this book to make sure that when she was using a remedy, I had the right plant. (I also had to look up whether the plant in question was native to the region of the world in which she was traveling.)
It turns out that, for almost any over-the-counter medicine and many prescription ones as well, there is a plant that will help with the symptom. God put this stuff in the world for us to find and use. He’s smart that way.
The book is great as a quick look-up reference, but as it turns out, there is also a benefit from reading it front to back. Then you will learn about the methods of collection, storage, and preparation, such as the difference between a tisane (used medicinally) and a tea (just for drinking); an infusion (made by steeping the delicate parts of the plant) and a decoction (made by boiling the hard parts of the plant). There is also basic medical and first-aid information, though obviously, to really know your stuff about that, you will need a much longer volume (such as Where There Is No Doctor), and ideally years of experience and a ton of luck as well.
I am already regretting not reading it front to back before using it as a resource in writing my novels. (It turns out that to make a tincture, you need to steep the herb in alcohol. Where on earth did Zillah get alcohol? She’s full of surprises.)
Speaking of surprises, it might be best not to wait until the apocalypse and then just go out and grab an herb for medicine (although in some cases that might be better than nothing). You’ve got to collect, dry, label, store, and refresh your collection, and also of course you’ve got to know what you’re doing. So, this is a very useful book for understanding the steepness of the learning curve.