There are a number of current event/nonfiction titles on Amazon's top 100 list, but the single most popular topic is food. Food-based books, which includes dieting books, cookbooks, and food information books, placed 13 titles on Amazon's top 100 as of May 18. The majority of the books were about weight loss, including the #13 book Wheat Belly and the #18 book The Skinny Rules. The top food-based book was one of the few that's unrelated to dieting: Vegan Cooking for Carnivores by Roberto Martin landed at #11 on May 18.