Mystery of the Spooky Shadow (Mystery Solvers) by Gloria Skurzynski, Alane Ferguson

Caitlin and her friends in the Science Club are thrilled when they discover a valuable Native American statue while on a field trip. But when the statue disappears, Caitlin's best friend, Joe Daniel, is accused of stealing it!

Caitlin is sure Joe Daniel is innocent, but how can she prove it? It's going to take some quick thinking--and scientific know-how--for Caitlin to clear her friend's name and point the finger at the real criminal!