I mean seriously?
You're supposed to be a UX designer. And you honestly can't see how that looks like social proof, that you are visually implying that these companies use your product?
I want this book so bad. But your contact form is awful. You can't design the simplest form on the web. You don't actually seem to have any actual experience in designing web apps, working for one unidentified startup.
I'm afraid I'd be spunking my money.
The screen shots are awful and show you can't actually design a good UX, take this as an example:
http://nathanbarry.com/wp-content/themes/nathan-refreshed/im...
Who puts a cancel button there? Seriously, that's the worst cancel button placement I've ever seen.
UX is very different from graphic design. You seem to be a graphic designer, not an interaction designer.
This book is one I've wanted for ever But it's got all the signs of being a stinker, the blind leading the blind.