My guest on the Cool Tools Show podcast this week is Simon Quellen Field. Simon is a chemist and former Google software engineer and is the author of over a dozen books, including Gonzo Gizmos, Return of Gonzo Gizmos, Culinary Reactions, Why is Milk White, Elements Vault, Why There's Antifreeze In Your Toothpaste, Electronics for Artists and, most recently, Boom!: The Chemistry and History of Explosives.