Effective Perl Programming is just packed with useful tips for perl fluency

Maybe. I like that book because I'm tired of read every time the same liric introduction in Perl. "Effective Perl Programming" is oriented on the experience Perl developers and accentuates on Perl specific features.

Sure, there are many good Perl books which were named in that post. Personally, I pick out following Perl books:

• Effective Perl Programming by Joseph N. Hall, Randal Schwartz;
• Mastering Algorithms in Perl by John Macdonald, Jon Orwant, Jarkko Hietaniemi;
• Object Oriented Perl by Damian Conway;
• Learning Perl Objects, References & Modules by Randal L. Schwartz, Tom Phoenix;
• Perl Medic : Transforming Legacy Code by Peter J. Scott;
• Network Programming with Perl by Lincoln D. Stein.

That's the true! Generally speaking it's a good practice to re-read masterpieces.