Contributor(s): Author: Kristiana Gregory Illustrator: Cody Rutty *** NEW free study guide written by the author: www.kristianagregory.com *** Lost Island was off limits -- until now. Jeff and David are going to the desert island to search for clues. And hidden treasureTown legend tells of a robber and a secret cave, but the brothers have to piece the truth together. With the help of their cousin, Claire, they'll get to the bottom of the mystery, no matter what they have to dig up.