That is the new book by Tom Chivers, and the subtitle is Superintelligence, Rationality and the Race to Save the World. Here is one excerpt:
Overall, they have sparked a remarkable change. They’ve made the idea of AI as an existential risk mainstream; sensible, grown-up people are talking about it, not just fringe nerds on an email list. From my point of view, that’s a good thing. I don’t think AI is definitely going to destroy humanity. But nor do I think that it’s so unlikely we can ignore it. There is a small but non-negligible probability that, when we look back on this era in the future, we’ll think that Eliezer Yudkowsky and Nick Bostrom — and the SL4 email list, and LessWrong.com — have saved the world. If Paul Crowley is right and my children don’t die of old age, but in a good way — if they and humanity reach the stars, with the help of a friendly superintelligence — that might, just plausibly, be because of the Rationalists.
There is also material covering Scott Alexander and Robin Hanson, among others. Due out in the UK in June.