Not a cookbook (although their chefs all have them), but check out the recipes at http://www.foodnetwork.com/
I particularly like Tyler Florence, Mario Batali, The Neely's, Emeril, Jamie Oliver... but all you have to do is type: Roast beef, canneloni, chicken, blueberry pie, chicken enchiladas, macaroni and cheese, etc... and you get dozens of recipes. I just click through and find 1-5 I like and either follow or alter them.
You'll be surprised how simple and easy sooooo many of these recipes are.
For even SIMPLER (we're talking 5 or 6 ingredients tops, in *most* of their recipes, Italians are big on simple simple simple) check out this AMAZING Italian Cookbook.
http://www.amazon.com/Silver-Spoon-Phaidon-Press/dp/07148...