Google Web Toolkit Source Code Error

[shamim vai]

Hello Ryan,
I'm reading your Google Web Toolkit book
and I downloaded the source codes
and when I tried to open the tar file in Ubuntu Linux,
it gave me error about the tar file.
For example, I tried to open
GWT1.5+-+Chapter+6+-+Desktop.tar

and I got following error:
tar: This does not look like a tar archive
tar: Skipping to next header
tar: Error exit delayed from previous errors

Please let me know how to get the source codes for Google Web Toolkit
book

Thanks,
Shamim

[Ryan Dewsbury]

Try renaming the extension to .zip and use unzip. Google groups has an
issue with zip firles right now.

[shamim vai]

Thanks a lot. I renamed the files, removed the .tar and replaced
with .zip
and I can unzip and view the source codes now.
Thanks again.