This season has seen a lot of deviation from the Family Guy norm, but fans will certainly be talking about this episode for years to come. And my guess is, not necessarily in a good way.
It reminded me in many ways of the classic Futurama episode "Jurassic Bark." You know; the one with Fry's dog. Yeah, that one. It was remarkable mostly for its departure from the show's normal tone, as was "Brian Writes a Bestseller."