I'm confused as to why you'd offer download of the book from your site at all. As the authors site states:
"Please download and share this book unmodified. (In legalese, these electronic versions are available under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License."
Does your download match this criteria since it's different from the download offered by the author? With regards your actual review posted here, it's seems little more than a summary of what the books contents section describes. Since you link to your own site (rather than the authors) offer what we've established is a questionable version of the book, it seems to be your simply trying to generate traffic to Alien Coders.