I'm assuming your talking about the implications of monetary and/or fiscal policy on output levels, interest rates, supply and demand levels etc?

If you are, then the best places to start would be any intermediate macroeconomics textbook. The ones I use are by "Abel, Bernanke, Mcnabb", "Minford, Peel", "Parkin, Bade". I can't remember what they're called though sorry, but probably something like advanced macroeconomics or summit.

If you are meant to be looking at the implications of monetary/fiscal policy, then I'm assuming you're looking at the classical or neo-classical model, so my suggestion would be to focus on Ricardian Equivalence for Fiscal policy, and the adjusment of the Aggregate supply curve under adaptive, and more importantly rational expectations in both the short and long run for Monetary policy.