It's a history of The Citizen Lab, a team of academics and hackers at U. of Toronto who investigate when bad guys hack the phones of journalists, activists, and the like. It's also a history of the rise of hack-for-hire mercenary groups. I'd read about about a lot of this in individual articles over the years. But this book put it all together and pointed out some long-term trends. When the Lab started out, they didn't think they'd be tangling with hack-for-hire groups. They thought they'd be detecting when governments blocked off access to parts of the internet. I guess...