perl books:
http://www.perl.org/books/library.html
http://www.freeprogrammingresources.com/perlbook.html

Best:

Practical Perl Programming
http://www.cs.cf.ac.uk/Dave/PERL/
 

Essentail Perl
http://cslibrary.stanford.edu/108/
http://cslibrary.stanford.edu/108/EssentialPerl.html

vsbabu

http://vsbabu.org/tutorials/perl/index-2.html#ss2.1

http://www.urgentclick.com/perl-tutorial.html

http://www.perlmonks.org/index.pl?node=Tutorials

http://www.ebb.org/PickingUpPerl/pickingUpPerl.html

http://www.perltutorial.org/

http://www.comp.leeds.ac.uk/Perl/start.html

http://www.perl.com/pub/a/2000/10/begperl1.html

http://www.tizag.com/perlT/perlfirstscript.php

http://www.sthomas.net/roberts-perl-tutorial.htm

http://www.pageresource.com/cgirec/index2.htm

http://affy.blogspot.com/p5be/index.htm

http://docs.rinet.ru/P7/

http://www.linuxtopia.org/online_books/perl/index.html

http://www.faqs.org/docs/perl5int/

http://www.perl.com/pub/a/2000/10/begperl1.html
http://www.perl.com/pub/a/2000/11/begperl2.html
http://www.perl.com/pub/a/2000/11/begperl3.html
http://www.perl.com/pub/a/2000/12/begperl4.html
http://www.perl.com/pub/a/2000/12/begperl5.html
http://www.perl.com/pub/a/2001/01/begperl6.html

http://www.perl.com/pub/a/2008/04/23/a-beginners-introduction-to-perl-510.html
http://www.perl.com/pub/a/2008/05/07/beginners-introduction-to-perl-510-part-2.html

http://news.oreilly.com/2008/06/a-beginners-introduction-to-pe.html

http://broadcast.oreilly.com/2008/09/a-beginners-introduction-to-pe.html

http://www.perl.org/books/beginning-perl/  Simon Cozens ( good but in pdf format )