Object Oriented Perl and
Elements of Programming in Perl are
the only non-animal perl books I've ever wanted or needed.
Since I don't have a CS degree or any formal instruction in
programming, I found that these books really filled in
some of the major conceptual gaps in my knowledge, as well
as providing me with some handy tools to hang on my belt.
The O'Reilly books that helped do this too are
Mastering
Algorithms in Perl and
Perl for Systems Administration
I think that one of the best features of Perl is the presense
of definitive texts, like the Camel and Cookbook. To me,
Object Oriented Perl is the OOPerl book. If it were
an O'Reilly book, I might be tempted to put a
Two-Humped
Camel on the cover. Or at the very least an
alpaca...
