In The Invisible Island, Dink, Josh, and Ruth Rose pack up a basket and wade out to Squaw Island to eat and explore. Before they can even spread their blanket, they find a hundred-dollar bill in the sand! But when the kids come back the next day, the entire island has mysteriously disappeared. What is the secret of Squaw Island?

J is for Jewel...

In The Jaguar's Jewel, the kids visit Dink's uncle in New York City and are dazzled by his museum's latest treasure, a statue of a gold jaguar with a precious emerald between its paws. But when the jewel is swapped for a fake, the police name Dink's uncle as a suspect! It's up to Dink, Josh, and Ruth Rose to uncover the real crook. Who stole the Jaguar's jewel?