“The Case of the Missing Joules”
“The Case of the Missing Joules”![magnifyingglass](https://store.ellenjmchenry.com/wp-content/uploads/2016/04/magnifyingglass.png)
For ages 9-14. A two-page story about how energy can change forms (for instance, from calories to horsepower) written in a humorous style. There are also six follow-up (easy, one-step) math problems that use an energy conversion table (wouldn’t you know it–the very same one the Detective Agency uses in the story!).