Borrow 'Eat For Life' from the library. It was written by Dr. Joel Fuhrman. Also, there's a website for the Vegetarian Society. You don't have to become a paying member - they have lots of free recipes and information there.
I find if you've not been a vegetarian most of your life that you slowly cut out animal foods and integrate more vegetable based meals. Eat organics as much as possible. Also avoid- at all cost- anything with "soy" additives unless the soy product states it's organic and non GMO. If you are older (over 30 or 40) you will need your protein so make a plan to how you will get sufficient protein (at least 25 grams per meal). The challenge of vegetarian eating is that it's a high carb low protein and most people end up packing in grains but as you get older your body makes more inflammation and you should eat less grains and legumes or cut them out entirely. As I said go slow so your body can adjust to the new style. Cut out animal protein slowly and integrate vegetables high in protein more and more.