EYB is designed to make using your cookbooks easier, not to replace them. The site is indexing thousands of cookbooks (focusing on the most popular books, for now). The indexes include the names of the recipes and the list of ingredients. Once you find a recipe you like that's in a book you own, you can just go directly to that book for the full entry. EYB is a lifesaver for those of us who have lots of books and can't remember where we saw a particular recipe!
Although EYB itself doesn't contain complete recipes, it's now indexing cooking blogs, as well, and for those it provides links to the complete recipes. So check out the indexed blogs for lots of complete recipes you may not own already!