Programming Perl
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Programming Perl, best known as camel book among hackers, is a book about writing programs or scripts using Perl programming language written by the creator of Perl, Larry Wall. With over a thousand page, it covers trivial cases to advanced techniques. Published by O'Reilly & Associates, the thrid edition, the latest as of writing, covers Perl 5.6.
Related books are: Learning Perl, Advanced Perl