"How Boat Things Work" as a title is a bit misleading when it comes to the content of this book. More correctly it probably should have been titled "How Sailboat Things Work" as there is surprisingly little info in there that applies to your average powerboat user. However, as an introductory guide to the working systems of a sailboat I think it borders on required reading for new boat owners or owners who want or need a better grasp of what is going on.
The book uses an abundance of clear illustrations to explain topics ranging from diesel engines to rig tune to toilet plumbing and in each case the author uses real world examples to illustrate his point. He doesn't discuss diesel engines in generic terms, he specifically describes and illustrates a Yanmar 2GM. To describe a galley footpump he illustrates a Whale Gusher Mk.3. Using examples such as those the author can speak in specifics using specific language rather than rely on broader terms to describe concepts that can be confusing to the average reader when approached in a one size fits all approach to explanations.
The writing style is concise, again much like a textbook, but not overly dry and each section only takes up a couple of pages.
If I have any complaints it's only in what was not included in the book. There is no discussion at all on outboard engines which I find amazing since I would guess that's the primary form of propulsion for the average american boat. At the other end of the spectrum there is no info on watermakers which to many boat owners is a completely mysterious system. There is also nothing on marine air conditioning.
On the whole the book should be a welcome addition to everyone's library.