Frank Einstein and the Antimatter Motor by Jon Scieszka
I have to tell a few secrets about Mr. Scieszka. He promises that the next book will be ready in 2015. Hey, what's taking so long? I figured it out all by myself - the concept of energy should come next. There better be more than one coming. Six sounds like a great number for this series. (see pages 81-85). Of all the formulas Mr. Scieszka could have put in this humorous book, he sneaked in the formula for the farts of cows! Parents probably aren't even noticing it. It is in the back of the book. I am not kidding. If I am not the first to read the next in this Frank Einstein series, I will have to formulate some plan.