I too read this book some 25 years ago while in high school. My dad was in the fire department, read it and passed it along to me, saying if I wanted to read what his work was really like, this book said it all perfectly.
If you can find this book, buy it and pass along to anyone who wants to know what being a firefighter is really all about. Descriptive, accurate and pulls no punches in the job-warts and all.
Highly recommend it, even if only to read true adventure which novelists can't match.