I buy a lot of tech books (see One Man’s Attempt to Support Tech Publishing), and generally have a whole slew of (largely uninformed) opinions about them.

Which is why I was kind of surprised when O’Reilly brought out the “Head First” series, and shocked when it was pointed out to to that they are consistently some of O’Reilly’s bestsellers. I can’t help but wondering if it has something to do with their Cosmo inspired cover design?