From the website, yes it is, and exists as a pdf on project guttenberg. This is just relayed-out.
> About this edition & thanks
> The text is based on the PDF version from Project Gutenberg converted to html by hand.
> Thanks to Paula Appling, Don Bindner, Chris Curnow, Andrew > D. Hwang and Project Gutenberg Online Distributed Proofreading Team for preparing the original PDF.
> The theme is borrowed from Dive Into HTML5 by Mark Pilgrim released under the CC-BY-3.0 license.
