Perl for System Administration is out for just over 2 years. So what? Nothing relevant to the book has changed since. Sure, 5.8 came out, but so what? The new things in 5.8 are mostly related to Unicode, threading and internals stuff. Hardly relevant for the sysadmin. Neither has Unix changed much in the last 2 years, we didn't just abandon processes or /etc.

Sure, the quality of the book isn't very high (just like many other O'Reilly books), but I don't expect a second edition suddenly would.

Books like "The Art of Computer Programming" and "Advanced Programming in the UNIX environment" were written before most (all?) Perl books. And they are more useful for a programmer (even a Perl programmer) than all "Perl" books combined.

The quality of good books doesn't decay over time.

Abigail