in reply to Is there a better way to learn Tk?
I'm not sure if this is useful, but there are two O'Reilly books for Perl/TK, the lower-level of which I found fairly useful, albeit basic.
I'm pretty sure they're called Learning Perl/TK and Mastering Perl/TK. I've found the first book in multiple libraries.
for(split(" ","tsuJ rehtonA lreP rekcaH")){print reverse . " "}print "\b.\n";
In Section
Seekers of Perl Wisdom