Colours is set in a future where corporations have taken the place of governments. People with jobs live inside the Corporations, the masses without jobs are the Hoards, living just outside the giant box, and then, of course, there are the people who refuse to live as part of the Hoards or the Corporations and they are even further away (where the sky is still true blue and the sun true yellow - where the colours are still true - and the weather isn’t controlled by a computer). It’s a great story just to read, but Walker does even better by including philosophical questions about time and location in terms of human understanding. He places real historical events into the context for even better understanding of how the world works and could change in different ways. He explores morality as his characters are put to the test to do what they are told, or what they know is right. Because it is the first in a trilogy, there are many areas that weren't developed, but it is well written and thought out and I'm very excited to continue reading when the next book comes out. (And don't forget to check out his other books -- I started with The End of the World Running Club, which was fantastic and made me follow his work)