As others mentioned, you need to avoid other grains (rye, barley and most oats) to avoid gluten. Also, gluten is a hidden ingredient in many processed foods (e.g., soups, broths, seasonings, etc.). Here's a decent list of unsafe ingredients:
http://www.celiac.com/articles/182/1/Unsafe-Gluten-Free-F...
(Note: this may get chopped, just go out to the
www.celiac.com website (a really comprehensive one that has recipes too!) and on the left look for the lists of safe and unsafe ingredients).
As it suggests at the end, there are many ingredients in processed foods that are unknown, so unless the product is labeled GF, you need to contact the manufacturer.
My favorite cookbooks are by Bette Hagman (gluten-free gourmet), with her Fast and Healthy being my favorite. It has a wide range of recipes. However, I find that I still use my joy of cooking and that it's not that difficult to convert most recipes. You can find gluten-free flour mixtures that you can replace one for one with wheat flour in recipes. For baked goods, you usually want to add some Xanthan gum, since the gluten-free flours don't have the elasticity of a wheat flour. But, if you stick with a whole foods diet (fruits, veggies, beans, unprocessed meats, nuts and seeds), you can naturally avoid gluten.
There are also quite a few blogs out there for folks on the GF diet and they have some excellent recipes. And, this is the most comprehensive celiac website (including recipes): www.celiac.com
Also, if you are on the diet for medical reasons, then you really should have your children screened as well, since it is a genetic disorder and is is currently one of the most underdiagnosed diseases in this country. The sooner kids start the diet, their chances for long term health impacts (e.g., cancers, autoimmune disorders) decreases.