First thing that caught my eye- do you mean Perl or PEARL? They're both programming languages, but as far as I know they're NOT the same.
Second, learn one language at a time, not three.
For Python, there is an EXCELLENT book released under the GNU FDL that I'm reading called How to Think Like a (Python) Programmer available from Green Tea Press (iirc). It's short, but it explains things very well. Most books I've seen spend ten pages showing the exact same concept. How to Think Like a (Python) Programmer does it in about three.