I always wonder about this. Every so often I'll accidentally google out a copy of the Perl Bookshelf online somewhere, usually someone's utility copy so that they can access it remotely. I own a copy of Perl Bookshelf 2, one that I purchased -- does that mean I can look at theirs, too? Or am I somehow encouraging further copyright violations?
Usually I cower from these weighty (legal|philosophical) issues and find myself at perldoc.com, huddling between the tutorials and trying to forget the horror that modern copyright is.
This is all apparently an introduction to a short list of things I'm wantin' to learn about lately.
And concerning the second one, I'm always looking for Lincoln Stein's book of that name, but my local Borders doesn't carry it. Oh, they carry the Java Cookbook, and they carry Learning Python, but apparently 'Network Programming With Perl' just isn't sexy enough for them.
Please, excuse the bitterness. I'll just special-order it one of these days soon.
Also -- though it's directly related -- I wanted to relate how ecstatic I am that my current SO is also a programmer to some degree. (And, should my previous SO be reading this...I'm not expressing disgust or something about you, just finding a happy common ground with someone else about something else.) Actually pointed at a book on the shelf and said, "I want to get that someday soon."
It was Learning Java, but I can excuse that.