Jane Mayer. Dark Money: The Hidden History of the Billionaires Behind the Rise of the Radical Right.

I did not read the book but I listened to presentation of Jane Mayer on NPR. It is good, much better than the sycophantic opus by Daniel Shulman. But Jane Mayer seems to share with the latter belief in sincerity of Koch brothers' "libertarian" convictions. From her description, they rather stand as psychopaths wishing that the human race would not outlive them for too much.