I'd suggest the last edition of Modern Perl. It is dated but it's free online: http://modernperlbooks.com/books/modern_perl_2016/index.html http://modernperlb

I'd suggest the last edition of Modern Perl. It is dated but it's free online: http://modernperlbooks.com/books/modern_perl_2016/index.html http://modernperlbooks.com/books/modern_perl_2016/index.html