I'd be interested in a book on a Perl Framework like Catalyst with DBIx::Class and TT. It's easy to learn syntax, but it's more useful to learn how to build an application properly. Perl web books kind of stopped at how to write CGI script or write funky mod_perl handlers, but think it would be great to have at least one Perl book that dealt with modern MVC design with Perl's mighty answer to Ruby on Rails