Important publications
Learning Perl,4th ed.
The Llama,the standard Perl tutorial
http://www.amazon.com/dp/0596101058
Object Oriented Perl
By Damian Conway,the best explantion of how to do standard Perl 5 object-oriented programming.
http://www.amazon.com/dp/1884777791/
The Perl Review
Published here in Chicago,it's the only magazine devoted to Perl.