Evil Inventions is a 2007 Horrible Science book by Nick Arnold. The book centres around science and inventions made throughout history. Like many "horrible..." books there is many jokes inserted to try and get children interested in science. Horrible Science books feature a relevant joke on the cover. Evil Inventions's cover features a guillotine in which a person is to be murdered. One of the guillotine operators laughs and says, "Chop 'til You Drop!".