I do not know what the earlier editions of this book were like, but the fifth edition is a masterpiece. With merely a grasp of the English language and eyeballs to look at pictures, Allen & Iano take the reader on a journey that starts with "these are the types of nails we use" and ends with an understanding of the components of buildings and how they are constructed from foundation to roof. Or the ability to pause at any construction site and have a general idea of what the workers are doing and what they have left to do. Of course this is done over the course of nearly a thousand pages, but those are probably some of the best pages I have read in my life. Since this book opened up a whole new world of observation for me. Now when I travel down the street I can identify the types of roofs houses have, whether buildings are made from site cast or precast concrete, what type of spandrels the office buildings have in their curtain walls, the patterns the bricks make, etc. People talk about how learning music introduced them to a whole new world, for me it was learning construction from this book. I noticed there was no coverage on concrete slab balconies or any type of balconies though, perhaps there are not very many balconies on the East Coast or in the Pacific Northwest. A book that is definitely worth the reward.