I would also suggest: End of the American Era by Charles Kupchan, A geopolital Gem The Paradox of American Power: Joseph Nye, boring but insightful American Empire: Andrew Bacevich, who talks about little change in Foregn policy, that the American Empire should use more of its military to support local powers. Tragedy of Great Power Politics: John J. Mearsheimer Many a right winger would like. Mearsheimer thanks the us should stamp out really any power that arises democratic or not, and especially concerned that China will become rich and democratic.