Did Zoe really poison her twin sister Chloe? What's the best way to rescue a super-sized pig trapped in a deep, deep hole? And how can you stop a chilly ghost from wrecking a tree-house sleepover? Fifth-grade supersleuths (and science whizzes) Doyle and Fossey are about to find out—and young readers will love learning the solutions!

Is there a creepy creature lurking in Mossy Lake? Is an evil plot stirring? Is something shocking happening to Caitlin's cat Zappy—and can he be de-zapped? Would-be scientists and detectives will want to slip into their lab coats, dust off their test tubes, and get on the case with Drake Doyle and Nell Fossey. Hint: to find the answers, kids will have to use such scientific principles as buoyancy and static electricity.