I'm very much looking forward to reading this. Here's the author, William Souder, talking about it on Book TV.*
One aspect especially caught my attention: Souder describes Carson's work as the turning point from conservation to environmentalism, and suggests that one new element of the latter is that it gives humans a central role. I won't know what precisely he means by that until I read the book. I'm hoping it's related in some way to overcoming speciesism.
* I don't understand why these videos aren't embeddable. Isn't C-SPAN publicly funded? Doesn't that oblige them to make the recordings freely available?