What is the best book to learn Python from Perl and C++ background

[Ignoramus20691]

I bought a "Hello World!" book for my 9 year old son. The book teached
"programming for kids" and it does it in Python. 

I do not know any Python, but I am very comfortable with C++ and perl.
I wrote a little over 100k lines of perl.

I want to learn Python quickly to help him with his studies/fun.

I would prefer a "no shit" book that quickly teaches a language to
programmers. 

Any suggestions?

i