Looking for suggestions on books about declining America

[librechik]

6. Chalmers Johnson

read anything by him, including "Blowback," "The Sorrows of Empire," and "Nemesis: The Last Days of the American Republic."

"A nation can be one or the other, a democracy or an imperialist, but it can’t be both. If it sticks to imperialism, it will, like the old Roman Republic, on which so much of our system was modeled, like the old Roman Republic, it will lose its democracy to a domestic dictatorship."[4]

He died in 2010, he is essential.

There is also 'The Great Unraveling" by Paul Krugman, which looks at it from the economics.

And, of course, The Best Democracy Money can Buy,"
by Greg Palast, not just a book, but a talk you can watch here:

Same title is used by some academics on C-Span, that is available on video too.