Great read. Really took my vertical transportation knowledge to a new level—elevated it beyond what I thought possible. Phil Andrew has ascended to new heights as an elevator educator and lifted us all up with him. This textbook has so many levels of depth to it. If you’re feeling down, this is the pick-me-up you need. Absolutely floored me on my first read. Also great for when you’re tired and need a minute to relax. This should really be part of elementary education curricula so children can be brought up on this book.