Here's a fun experiment. What would happen if everyone who read and enjoyed and would recommend a Perl book to a friend or colleague wrote a short review and published it online somewhere? It could be your favorite Internet reseller, or your local Perl Mongers site, or even a large tech news site such as Slashdot.
There are a lot of really good Perl books out there (I even have my name on a few), but they're not really getting a lot of attention. I wonder if talking about them more (and not just recommending them on Perl Monks or talking to the authors privately) would help get Perl books and Perl itself more attention in the wide world.
(If the result goes well, I suspect it would also make it easier to produce more Perl books in the future.)