For learning I would highly recommend the following books: Beginning Perl by Ovid. Modern Perl by chromatic. There are a lot of other good Perl books but

For learning I would highly recommend the following books: Beginning Perl by Ovid. Modern Perl by chromatic. There are a lot of other good Perl books but some of them are getting old and it is better to already know a bit before reading so one can separate good from dated etc.