I too must recommend the '
Iron Coffins', a great book indeed.
The AI in every game comes really down to the player. How difficult he wants the game be? How good player he is? etc.
AI is (and will be for a looong time into future) predictable, after few hours of playing, you can predict what heŽll do next.
But then again, I really dont know how much the AI is improved in GWX... I still havent played more than 1 mission.