Instruct: Classify the given review as either positive or negative.
Query: Cain, Abel and the Green Knight

Twists, turns, surprises abound in the plot. Meanwhile the novel whirls around the mythic, eternal themes of fraternal love-hate, the meaning of family, death and renewal. And, like Shakespeare's late Romances, there are lots of surprise romantic pairings to tie it all up. One of Murdoch's best.