The Case of the Barfy Birthday (Doyle and Fossey, Science Detectives Book 4)

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! Fifth Graders Drake Doyle And Nell Fossey Use Their Detective And Scientific Investigation Skills To Solve Cases Which Involve Food Poisoning, Missing Terns, A Haunted Treehouse, And A Pig In A Pit.