Naughts & Crosses

Callum is a naught, a second-class citizen in a society run by the ruling Crosses. Sephy is a Cross, and daughter of the man slated to become prime minister. In their world, white naughts and black Crosses simply don't mix -- and they certainly don't fall in love. But that's exactly what they've done.
When they were younger, they played together. Now Callum and Sephy meet in secret and make excuses. But excuses no longer cut it when Sephy and her mother are nearly caught in a terrorist bom...