Sir Cumference and Lady Di of Ameter visit their annual Fracton Faire. Their day is interrupted when they realize that goods are being stolen from the merchants. And then the earl's sheep go missing too! The earl decides to use "Fracton numbers" to catch the culprits. After all, outsiders don't know how to read numerators and denominators properly. With the math trap set, will the earl and his friends catch the thieves? Part mystery and part caper, this clever introduction to fractions is the whole package.