You have great basics! I'm a huge fan of European foods. Most my books are of French, Italian, German, Austrian, and Spanish flare. I do however know one book that I love to use. It's sort of a dessert/chocolate cookbook. Try getting your hands on The Mast Brothers Chocolate by Michael and Rick Mast. It primarily a chocolate cookbook but also contains recipes for mole sauce and coq au win. It teaches you how to temper chocolate, what part of the bean it's from, and whole bunch of "good to knows." The book does a great job at incorporating chocolate into recipes you wouldn't think of.