There are any number of "good" books. Unfortunately there are even more "bad" books. For the record, my definitions of good and bad has to do with the quality of the writing far more than the subject or the content of the tome in question.
As far as I'm concerned, publishing bad writing is an offense that should be punishable by an afternoon in the public stocks.
And no, what comprises "bad" writing is definately not a matter of opinion, it's a matter of established fact and long usage.