0Tony and Jace have dreams of becoming medical doctors. While going about their everyday lives, these brothers get roped into some pretty interesting medical cases. In this fourth book of the series, Tony and Jace learn about viruses from a very special teacher! Who knew learning about germs could be so much fun!Doc 2 Doc is the perfect series for parents and teachers who want to introduce science and the field of medicine to their children in a fun and colorful way.