Currently reading Learning Perl. Although I've taught myself most of the basics in the last year or two, there is still a lot in there that fills gaps, and it's good to have things explained properly. And the best bit is finding out little nuggets like for instance the very cool feature of being able to attach a DBM file to a hash with one line :
dbmopen(%somehash, "dbmfilename", 0644);
That's it. Seems to work without any extra modules either. Neat!