Perl by Example
I believe the 3rd edition is out.
by Ellie Quigley
Prentice Hall.

and

Programming Perl
3rd Edition
By the Perl GODS themselves
Larry Wall, Tom Christiansen and Randal L. Schwartz
O'Reilly Press

Mag-Rag
The Perl Journal.
Most information without the advertizement on every page.
http://www.tpj.com for subscription

Additional valid information can be found on almost any Linux or Unix machine with Perl installed.

Information Copied from Man Pages.

>man perl


For ease of access, the Perl manual has been split up into a number of
sections:

perl Perl overview (this section)
perldelta Perl changes since previous version
perlfaq Perl frequently asked questions

perldata Perl data structures
perlsyn Perl syntax
perlop Perl operators and precedence
perlre Perl regular expressions
perlrun Perl execution and options
perlfunc Perl builtin functions
perlvar Perl predefined variables
perlsub Perl subroutines
perlmod Perl modules: how they work
perlmodlib Perl modules: how to write and use
perlform Perl formats
perllocale Perl locale support
perlref Perl references
perldsc Perl data structures intro
perllol Perl data structures: lists of lists
perltoot Perl OO tutorial
perlobj Perl objects
perltie Perl objects hidden behind simple variables
perlbot Perl OO tricks and examples
perlipc Perl interprocess communication
perldebug Perl debugging
perldiag Perl diagnostic messages
perlsec Perl security
perltrap Perl traps for the unwary
perlstyle Perl style guide
perlpod Perl plain old documentation
perlbook Perl book information
perlembed Perl ways to embed perl in your C or C++ application
perlapio Perl internal IO abstraction interface
perlxs Perl XS application programming interface
perlxstut Perl XS tutorial
perlguts Perl internal functions for those doing extensions
perlcall Perl calling conventions from C