There are now four Worldwide Ward Cookbooks.
Worldwide Ward Cookbook
Worldwide Ward Christmas Cookbook
Worldwide Ward Cookbook - Mom's Best Recipes
And the newest one...
Worldwide Ward Cookbook - Secret Recipes
These books can be found at Seagull Books, Deseret Book, Costco, Walmart and Bed, Bath & Beyond. Of course, this will depend on where you live. Most book stores (if they don't already carry it) can order the book for you. Just ask for the title(s) you like.
If you'd rather order books online, you can find them at: