Updated with the latest version released on 2nd December 2013
The Access to Insight offline version has got a lot bigger as it includes some PDF files. You can download the entire web site from the ATI web site as a Zip archive,
or directly from my web site's Related Links page as a smaller self-extracting archive:Related Links
My download is smaller due to using 7-Zip LZMA2 compression. If you are on a slow connection the smaller download will save you a little time, though the difference is not as great as it used to be due to the PDF content, which doesn't compress much.
Save the file to any convenient folder and execute the archive to extract the contents. Load start.html in your browser, and bookmark the page for future reference.