This book was great for showing various textures such as chrome, glass, plastic and rubber.
Not only can you apply these things to mecha, per se, but it can also be applied towards houses, buildings, fences, etc...
This was the first book in the series I ever bought, and I must say I have not been disappointed. It gives a lot of useful tips on how to draw cars and helicopters and shows you the basic of "showing speed."
If you look closely at the cover, you'll see that it incorporates everything the book talks about, except for speed lines, but it shows all the textures and detailing.
I liked how it showed that by adding a few straight lines and details, you could turn anything into mecha.
That being said, another thing I'll comment on is how much I've improved my drawings. Before I considered about textures, my drawings looked plain and "dead," but with the stuff about textures, they look alive and ready to battle it out with the next villain that comes their way. My villain characters are also as good, they look truly evil as well.