The Angry Gymnast — Jerry B. Jenkins

This is the eighth book in the adventures of twelve-year-old Dallas O'Neil and his Baker Street Sports Club. Dallas and his friends hope to learn gymnastics from an Olympian who promised to train them and make them champions. They know it may take years to really become good at the difficult sport, but they're willing to work at it. Unfortunately, their coach isn't. Disappointment and sadness overtake her, and she nearly quits the sport. What can Dallas and his friends do? Read this installment of the Baker Street Sports Club to find out!