Not since Kliban has there been a cat book this edgy. Edgy as in Bosco, the demonic Siamese with the out-of-focus eyes, razor-sharp fangs, and his own idea of Feng Shui. Or the half-shaved freak named Mr. Fliegel, who looks like a cross between a poodle and a lion. Mr. Fliegel shrugs and says, "Chicks dig me." Or Kato, resplendent in his Three Musketeers outfit: "One for all, blah blah blah . . . now just get me out of this @#%&ing costume!" Or Clark, whose hobby is eating other cats' food. Tina, who somehow always just misses the litter box . . . sucker.