The book is short and covers a lot of topics: The history of fire, its chemistry, how to make a fire, specifics about wood, ethics of building fires, fire for survival purposes, cooking by fire, information about wild fires and finally information about burns.
The chapter about building a fire (26 pages) is pretty well done. A lot of it is common-sense, but there are a few ideas and illustrations to deepen ones understanding of how to make the fire you intend.
Aside from that chapter and the -- in my opinion -- worthless 16 page chapter about cooking over fire, every other chapter is 10 pages or less. This is COUNTING each chapter's header page which consists of the title and a quote relating to the concept. Add in illustrations and the not-particularly-small print size and you blow through 4 chapters before you realize you've learned nothing you didn't already know.
I do find it enlightening to see the ethics of fire covered in this book, but it felt overly repetitious and preachy by the time you get half-way through with the book. Rest assured -- you still get preached to all the way till the end.
If you are interested in fire enough to want to read a book about it, you probably know 90% of what is in this book. I don't want to belabor the negatives, but know this: I have never felt the need to review a book until this one.