My son (Lightholder) got me that book, along with a set of hammers and dollies. It is, indeed, a very good monograph on the subject, although I am no expert. I am taking an autobody class at a local community college, just to gain some knowledge as I work on the restoration of my '50 COE. My only comment would be that the monograph, written long ago, of course, does not include issues with metal bumping on modern vehicles with thinner alloy sheet metal. Specifically, you may get "waves" away from where you are working if you use direct "hammer on dolly". This does not tend to happen with the mild steel used in our older trucks.
