J.S.
Agree with "Super Baby Foods" by Ruth Yaron. Her guidelines are mostly good for beginner foods, although watch out for the early introduction of things like nuts -- she recommends them, and also is a vegetarian so she never includes meats in her menus. Other than that, the "how to" portion of her books, complete with how to choose, cook, and store veggies and fruits has been very helpful for me!