Eye of eternity

Now that George and his friends have explored the mysterious tunnels beneath his house, they start to believe there might be a real treasure. They already know there is real danger. There are others in the tunnels, and they are digging, searching for Kidd's hidden claim. But only George and his friends have Kidd's journal, which is filled with cryptic hints about the underworld and details about the Eye of Eternity, the brilliant diamond that carries a curse. If they think deciphering Kidd's archaic clues is hard, it's nothing compared to the subterranean obstacle course. These kids are going to uncover the diamond, or they're going to die trying.