A scan of contents list suggests that it is mostly about heat engines. No mention of chemistry. Chemical reactions are mentioned in passing in the text but with no detail. Also no obvious signs of much interest in conduction, convection, or radiation.

So it's fairly narrow focus, but that is not necessarily a bad thing.

Indeed! Truth be told, I think the book really is missing a chapter on refrigeration systems. I had to call it done at some point for my own sanity. Maybe someone will jump in and add one someday!