I enjoy this book for the sheer variety of mechanisms it investigates and illustrates to the reader -- horological (timekeeping) mechanisms, firearms such as the Lebel rifle, simple gear train mechanisms used for a specific purpose -- there are a few of everything inside these pages.  Air-powered appliances, mining mechanisms... There are a huge number of things in this book, many with an individual blurb explaining specifically the purpose of that mechanism.<br><br>Designers, those who are mechanically-minded, and anyone who likes well-designed, complicated things -- all of those readers would enjoy this book.<br><br>Not least are the well-drafted hand drawings of each mechanism... those are interesting, as well...