well the learning path are almost non finite numbers..
Laurent_R++ for your very good answer. But i feel the need to add something:
I had some problem with Intermediate Perl: is a bit confuse. Dont know if is only my perception. I suggest you to have it anyway (and after this also Mastering Perl): review the index periodically and look if something catch your attention because near a problem you are facing at the moment. For example when is the time for you to make a module you must jump through many different not contigual chapters.

Laurent_R yet explained the nature of Modern Perl: the key word is in the title, and is an adjective: the first goal of that good book is to give a fresh look at language, because the state of the art of Perl has moved a lot and the book bring a light where shadows were. An example? the context explaination is something i never read in such a clear way.

As last suggestion, as always, i recommend an old and somehow outdated book: The Perl Cookbook. I suggest to buy it and read it sparsely as side reading. You can profit of many real life examples in many different fields: is like a panorama view.

A few related nodes:
how can I learn well
Advice from elders for a newbie
Newbie to perl
Want to learn PERL
using perl as a new user
Help for a sporadical scripter.

HtH
L*