The Moosewood cookbooks have some very creative, elegant and not too difficult recipes that are worthwhile even if you aren't vegetarian. Some of my favorite recipes are in this book, and it's really useful for dinner parties, especially if some of the guests don't eat meat.
The Moosewood Collective is a hold-over from the late 60's and early 70's. It's a restaurant near the Cornell University campus, run by a "collective" or communal group of owners who share the restaurant proceeds equally while doing any of the jobs, such as cooking or washing dishes.
The Moosewood New Recipes are international in flavor, ranging from Middle Eastern dishes like Baba Ganoush and Hummus (eggplant and chickpea dips) to French soups, Asian noodle dishes and Hispanic, Greek, and Italian dishes as well. There are some "gourmet" creations like Chilled Cantaloupe-Amarretto Soup and also some earthy ones like Creole Beans and Rice.
My particular favorite is the Tempeh Reuben Sandwich. Tempeh is a fermented soybean cake that scares off all but the most dedicated vegetarians. But here, tempeh becomes a delicious substitute for corned beef. In fact, I prefer Tempeh Reubens to the classic ones--more flavor, less fat. Frankly, the book is worth the price for this recipe alone.
Now, this book isn't 100% vegetarian (because fish is included, and they were part of the animal kingdom last time I checked.) And cheese is used, so vegans will find the recipes limiting. But if you want to jazz up your cooking and use more vegetables, this book is a real find. In particular, the appendix section on cooking dried beans is particularly helpful if you want to make inexpensive but delicious dishes like rice and beans (black beans or Creole red are both included here, as well as a navy bean soup.)