内容简介：
As school is nearing the end, Joey Jenkins and his friends are getting ready for a return visit to summer camp at Camp Davis. But the gang meets a new camper this year, and Mr. Davis's prize-winning calico goat named Billy Bear is missing. With the help of an expert animal tracker named Tommy Clearwater, will the bunch be able to find Billy Bear in time for the county fair? Will they find out how he disappeared? Read along as Joey and friends investigate "The Mystery at Camp Davis."