"What's that tapping?" A rhythmic tapping in their classroom confuses the members of the Power Coders Club, but they realize they don't have the skills needed to solve this mystery. However, they do have the skills needed to find a "simulated friend," a real person in the school who has the talents they currently lack. Using data analysis, the club members put their heads together to find the best student to help them. The Power Coders work together with their new friend to discover the source of the cryptic, rhythmic tapping. The colorful illustrations, humorous dialogue, and coding examples are sure to keep readers entertained as they learn a real-world application for data analysis and computational thinking.