Perl 5 version 8.5 documentation
perlbook - Perl book information
The Camel Book, officially known as Programming Perl, Third Edition, by Larry Wall et al, is the definitive reference work covering nearly all of Perl. You can order it and other Perl books from O'Reilly & Associates, 1-800-998-9938. Local/overseas is +1 707 829 0515. If you can locate an O'Reilly order form, you can also fax to +1 707 829 0104. If you're web-connected, you can even mosey on over to http://www.oreilly.com/ for an online order form.
Other Perl books from various publishers and authors can be found listed in perlfaq2.