Haven't read it yet.
This is not peer-reviewed.
This was a book ten years ago As well as a two part podcast and a Q&A and a call to action. There's even a counterpoint.
I'm pretty sure I've suggested you read them.
At least twice.
350.org has been a leading climate change action/adaptation organization since 2004. That your author lists no one associated with the organization or its writings (or, really, much that predates 2017) seems more like a deliberate omission than an oversight.
And FFS if you're going to call something a "map" maybe you should have a graphic or two.