Gr 5–8—Using a CSI-style methodology and the scientific process, disease scene investigator Annie Biotica unravels mystery illnesses. Each volume includes five cases that are all related to the featured body system. After an introduction, the case studies typically follow the same format: "The Crime," "The Clues," "The Suspect[s]," "The Evidence" (which is culled from one to two lab tests), "The Verdict," and the treatment or "Justice." Bacteria contains an additional "Protect Yourself" section, and Popcorn follows up a of couple cases. Diseases and lab tests are explained, and preventative measures are included. The verdicts don't flinch with failed treatments occasionally resulting in death (AIDS in Infected Tick and rabies in Rusty Nail. "You Solve the Case" scenarios use guiding questions to help readers solve medical mysteries on their own-though answers are included in the back of the books. Despite some inconsistencies, odd language choices, and typos, this set is exciting and informative. Color photos with plenty of gross-out close-ups and numerous illustrations add to the appeal.