It had some science and engineering, but was aimed more toward people interested in the social, cultural, and artistic impact of elevators and escalators.
I pulled this off a library shelf at random because I knew nothing of the subject. There is much here that's very informative (3 stars), but it's the spectacular diagrams that show how this moving machines work, and incredible photographs of the results of architect's dreams. (Thus, a 4th star.) One idea/photo particularly impressive was of a floor, about the size of a bedroom, centered in a house so that the owner, in a wheelchair, could simply move up and down and easily access all parts of the house. Otis, the original inventor of the idea, and the Otis company developed an "Odyssey system" in which an elevator could move horizontally, say, through a parking lot, then vertically or horizontally through a building. And, since the shafts were designed to hand more than one cab, height restrictions could be removed. This book presents a great diagram and explanation as to how this would work, but the system was never put in place: when 9/11 occurred, the huge elephant in the room got even bigger, as there was no system in development to get people down and out of a high-rise fast in case of non-functioning elevators. (And I don't think there is a system anywhere in place now.) While living in California, I used to marvel, when crossing the Long Beach bridge/highway extending over the Long Beach port, at the fields of endless and mostly orange container boxes. This book says there was no such thing as these container boxes until 1956 when they were invented by Malcome McLean, and that led to the "Vertical Reciprocating Conveyor' which led to 95% of the world's freight being carried via sea. And just imagine the power of escalators in department stores: displays of merchandise come into view that would otherwise remain unnoticed and thus unsold. Amusement Parks? In 1903, Coney Island's Luna Park offered an inclined elevator up to a chute that landed riders on a mattress-type flooring-with attendants available for safety. The ride's name was 'Helter Skelter' and eventually riders could choose between 3 different chutes to the ground. And off we went to build bigger and better roller coasters. There are so many fascinating details and uses: what has worked, what hasn't worked, and what might work in the future. Even if you don't read the prose, a flip through the book for a review of the photographs is well worth one's time. If I'd had this book, say, in my freshman year of college, I might have been inspired to solve the evacuation problem of high-rises. Imagine! Perhaps I still can...