What's "a good book about programming for Unix"?
What's a good book about programming for Unix? In Learning Perl, while showing the file test operators, we say:
Don't worry if you don't know what some of the other file tests mean--if you've never heard of them, you won't be needing them. But if you're curious, get a good book about programming for Unix.
But, we then leave the reader hanging without giving them an idea which book they might. I guess Chapter 4 of Stevens's Advanced Programming in the UNIX Environment might be the answer, but is there something else?