I would recommend starting with Master of the Senate, since I think it's his best work. But I started with the first in the LBJ series and it's incredibly gripp

I would recommend starting with Master of the Senate, since I think it's his best work. But I started with the first in the LBJ series and it's incredibly gripping as well. The Power Broker is also excellent and absolutely worth reading, but in my view not quite as good as the LBJ series.