The book is a puzzle book, it is also an introductory chess course, but not a comprehensive one. It is a good first chess book for the absolute beginner. It serves an important purpose, which is to get players started in chess, and to introduce the most important aspects of the game to begin with, which are tactics and checkmate - from both the offensive and defensive perspective. Perhaps this will shed more light on what kind of book it is...
Bobby Fischer Teaches Chess...a book review...
https://www.chess.com/blog/RussBell/bobby-fischer-teaches-chessa-book-review
There are books written by Capablanca and Lasker to help inexperienced players play better chess which give the reader a lot of the flavour of what made these players great. In particular Capablanca puts a lot of priority on learning endgames.
This one doesn't and can't give much about Fischer, because it wasn't written by him.