Highly readable, as are all his books. Covers some of the “buried” functions that our government performs and how important they are. Based on real profiles of and interviews with people who work in these functions. I couldn’t put it down until I finished it.
It’s really, really interesting and I learned a lot. Didn’t want it to end.

“What would you name as the top 5 risks?
Lewis asks this question to former government employees from the departments of Energy, Agriculture, and Commerce about their agencies.
The former chief risk officer at Energy answers: 1) a broken arrow (a lost or damaged nuclear missile/bomb), 2 and 3) North Korea and Iranian nuclear aggression, 4) the vulnerability of the electrical grid.
It is the 5th risk that Lewis focuses on, and it where the book’s title comes from. That risk is bad project management.
Most of what the government does, as Lewis points out, only makes the news when things go very badly. The real work of government involves dealing with enormously complex challenges that can’t be managed by the market.”

I highly recommend it. Much more readable than I expected and also much more informative.
I checked out the e-book from my local library.