This would have a very specific (read: small) audience, so it is probably not a viable "book" in the usual sense of the word, but I'd be happy to devote some of my graciously granted japhy.perlmonk.org
space to a Perl-golfer's guide. The phrase I used on the "Fun With Perl" mailing list was "I'd appreciate it if [everyone] showed what drivers, putters, and wedges they used to squeeze every last yard out of Perl."
With golf being a popular pastime of seasoned and apprentice Perl programmers alike, it only seems fair that the Tiger's and Nicklaus' among us should impart some of their knowledge of the shortcuts in Perl, helping less experienced golfers avoid the sandtraps of routine programming. Think of it as a pro-am.