Set in a dystopian future, Black Sheep chronicles the downfall of narrator Isao Dazai, who is "convicted of being Japanese" in Asian-Sydney. Multiculturialism is now considered a disease for which the only cure is ruthless segregation. We're in Orwellian territory here, with routine surveillance of citizens by cameras, microphones, and powerful masked Segregators, and a history and culture that's tailored to your ethnic origin, which in turn dictates where you can live.
Peek's writing is tolerable but not stellar, and is plagued by repeated homophone errors--"too" for "to" being perhaps the most egregious. The future world is well imagined, if implausible--who watches all the footage? listens to all the tapes?--and there's excellent irony here and there, but the plot relies on at least one far-fetched coincidence and the characterisations are not strong. Isao's character in particular can't carry the narrative.
If you're a fan of dystopias, you'll probably want to add this to your collection; otherwise, it's a suitable read for a train journey or rainy night.
(The review does have spoilers, though not much, since it's not that big a review. It's a lukewarm one, yeah, but that happens. I guess we can say it didn't work for her.)