Learning Perl is a great book and has helped me a lot with learning. One gripe, though, at least for the 6th edition. The chapter that covers filehandles includes no exercises that require the use of filehandles. A few chapters on, the very last in the series of chapters of regex, they expect you to have retained everything from the filehandle chapter.

Oh well, it's my fault for being a dumb ass and not paying attention.