Yeah. What's probably going on here is, the publisher decided how many copies to print the first time around by thinking along the lines of, "A major Perl book would sell a lot of copies, but this guy Dominus is an unknown author, so let's play its safe." Of course, MJD is not an unknown in the Perl community, but a book publisher would understandably not put a lot of stock in that. (The communities surrounding most programming languages are rather smaller than the Perl community for one thing, and for another, a book publisher thinks more in terms of traditional forms of author fame, such as having written previous books that sold x number of copies, which on the whole is the right way for them to think, incidentally; now and again they underestimate demand, but that can be fixed with a second printing.)