in reply to (Perl) Programming Books like the Camel Book
Besides Programming Perl, I tend to keep a copy of the K&R (The C Programming Language), because I use C infrequently enough to remember the right syntax for everything, yet frequently enough to need to know. Mostly I try to reserve space for things to help me on whatever project I might be working on at the moment. All of it generally involves either Perl or C, though. Also, a copy of the Aenead, because when things get bad it tends to give me comfort that the first appearance of the hero of the epic has him wishing he was dead.