In this fourth clever chapter book starring Drake Doyle and Nell Fossey, real science is seamlessly woven into four exciting cases, including a mysterious food-poisoning epidemic and a spooky tree-house ghost.

The snappy dialogue and wacky scenarios are perfect for middle-graders, who will enjoy discovering the appendix of science activities, which focus on such concepts as epidemiology, code breaking, phases of matter, and simple machines. Each corresponds to a case in the book and will have readers scrambling for their own lab notebooks and detective gear!