The Code Book on CD-ROM is now available online for free download. This CD-ROM was designed to accompany The Code Book, and is not an e-book. To find out what's on the CD, visit About the CD-ROM.

• The Code Book on CD-ROM will only work on PCs running Windows.

The download is a simple process, and we've put together a set of step-by-step instructions to make it as straightforward as possible. You should use the README file to guide you.

• Two versions are available:
• codebook.zip - the complete version, 600Mb, takes 3 hours to download on a standard household broadband connection (rated at 512kbps). Download codebook.zip
• code-book-lite.zip - a cut-down version with video clips removed, less than 10% the size of the full version, which takes less than 15 minutes to download on broadband. Download codebook-lite.zip
   
• Once you have downloaded the file, you can either install it directly onto your computer, or use a CD-ROM writer to burn your own copy of The Code Book on CD-ROM.
• Just follow the instructions in the README file.
• The README file includes details of exactly how much hard disc space you will need for the download.

We have made every effort to ensure that The Code Book on CD-ROM will function correctly on any Windows-based computer. However, we cannot accept any responsibility if it fails to do so.