Perl in a Nutshell? Yikes! It's ancient (1998). Is it truly still useful to you today as a reference?
It just seems like it must be largely obsolete now, and there must be better books to use today as Perl references. I understand "old school" and its many positive attributes, but the Nutshell book is a relic of a bygone Perl era.
The Nutshell isn't used much a reference at home, but in a contract where they are still running Perl 5.8.x and can't upgrade, it's a God send. I have learned too many neo-perlisms from working with more current Perl's at home; so if I can't find it in the index in Nutshell, then I really can't use it in my for-pay code. (And yes, I know about perl -f, I just don't remember it as often.)