Basically, the setting is a world still ruled by segregation/apartheid, execpt blacks (called Crosses, whites are known as Noughts) are the majority. The seires follows the lives of Sephy, a Cross, Callum, a Nought, and (from the second book onwards) their mixed-race daughter, Callie Rose. Recurring subjects include forbidden love, terrorism, and bad decisions.
Although I started by talking about the concept, the books are very character-based. So if it sounds too pollitical for you, it probably won't be in reality.
