People are notoriously bad at assessing risks, and Kluger devotes a chapter to examining why this should be. He also has chapters on the problems of tackling poverty, on how babies learn to talk, and on why the instructions for our gadgets are so complicated. The final chapter asks complexity science can be applied to the arts.
The book doesn't really introduce a groundbreaking new concept as claimed in the blurb. Rather it's a fairly typical investigation into the complexities of our world. This isn't so bad, as it's easy to read, and so would provide a good introduction to some of these subjects. The real problem is that it has no recommendations for further reading (in fact it doesn't even have an index), so it's hopeless for following up on a topic which interests you. So it's OK for a bit of light reading, but don't expect too much from it.