This Is What You Just Put in Your Mouth?: From Eggnog to Beef Jerky, the Surprising Secrets of What's Inside Everyday Products by Patrick Di Justo

This is a rather humorous look at the appalling chemicals contained in many processed foods. For instance, in Hostess Lemon Fruit Pie, there is "Calcium Sulfate - Plaster of Paris. Used for millennia to congeal soy milk into tofu, this gunk has hundereds of applications - many a school science project (like a baking soda and vinegar volcano) was modeled in plaster of Paris." Each chapter is about one specific food like substance and includes a breakdown of the chemicals and a backstory telling some of the author's thoughts. It is a lighthearted look at the sad state of the US "food" supply.