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One comment though: In example 8.19 Program: tctee (pages 304-306) the author states this "tee" replacement is one of the many venerable Perl programs written nearly a decade ago that still runs perfectly well... But if it ain't broke..."

Unfortunately, tctee.pl is not a replacement for tee. While tctee.pl handles text files OK, it does not work for binary files, whereas "tee" does.

It's left as homework for the reader to work a more general solution that does subsume tee.

In spite of this "nit," this is definitely a book to have handy when you want to solve some practical problem in short order.