Sink or Swim: The Creature from the Seventh Grade, Book 2

Theres a thief in town, and all signs point to twelve-year-old Charlie Drinkwater. Once you spontaneously morph into a giant mutant dinosaur in the middle of the school day, people will suspect you of just about anything. Charlies teachers decide that all he needs is a little discipline, so they make him join the swim team. The only problem is, Charlie is terrified of the water. (Hes terrified of a lot of things.) Charlie and his friends vow to apprehend the real criminal and clear Charlies name. But when they discover who the actual thief is, Charlies problems get a whole lot bigger...not to mention slimier, scalier, and smellier!