What do you get when you combine evil microbes trying to harm the circulatory system and a super detective skilled at Body System Disease Investigations? You get crime-solving super sleuth Annie Biotica! Join Annie's team: Read cases about Lyme disease and malaria. Check out a line-up of the disease suspects, such as Epstein-Barr virus. Test the body system for infection and help Annie Biotica and her science team crack the case! These engaging and easy-to-read books use the scientific method to decipher symptoms, review lab results, and diagnose and treat diseases. Some cases must be solved by you!