I read this very good book, here in Brazil. This book has dozens of photos. The vast majority of its photos are in color. And the photos of this book are excellent.
The text itself is amazing clear, concise, short and correct. An expect would expect more text, but for me, it was enough.
I found just two small problems in this book:
1-About the Caterpillar D-9 there's informations about D-9 made until 1981, but this book has nothing about the new D-9 made since 1982. Since 1982, all D-9 have an elevated drive sprocket track-type tractor. And this book forgets they.
2-On page 81, this book writes 1996, instead of 1986, about the last year of production of Caterpillar D-10.
These small problems, don't tanish this book and I must give five stars for it.