You are looking at a very old, but free version of the course.
If you are interesed the most recent version, check it out
on the Perl Maven site.
Example 12-5. examples/www/server/html/bad.html
In the above line there is a typo
<a href=http://www.perl.org.il>link without alt tag and quotes</a>
If you are interested in on-site trainings by the author, please
contact me directly.