Case Of The Barfy Birthday, The

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