Celine Steen is the co-author of 500 Vegan Recipes, The Complete Guide to Vegan Food Substitutions, Hearty Vegan Meals, Vegan Sandwiches Save the Day!, Whole Grain Vegan Baking, The Great Vegan Protein Book, and The Great Vegan Grains Book. She is the founder of the award-winning blog Have Cake, Will Travel (havecakewilltravel.com).Joni Marie Newman is the founder of justthefood.com and the author of 10 vegan cookbooks, including 500 Vegan Recipes, The Complete Guide to Vegan Food Substitutions, Hearty Vegan Meals, and Vegan Food Gifts. Joni is well-known in the vegan community and frequently speaks at vegan conferences, cooking demos, and other events. She likes to spread the vegan love on Twitter @JoniMarieNewman.